36394777491840 has 1024 divisors, whose sum is σ = 136757100902400. Its totient is φ = 9242814873600.

The previous prime is 36394777491833. The next prime is 36394777491857. The reversal of 36394777491840 is 4819477749363.

36394777491840 is a `hidden beast` number, since 3 + 6 + 3 + 9 + 477 + 74 + 9 + 1 + 84 + 0 = 666.

36394777491840 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7758423895 + ... + 7758428585.

It is an arithmetic number, because the mean of its divisors is an integer number (133551856350).

Almost surely, 2^{36394777491840} is an apocalyptic number.

36394777491840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36394777491840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68378550451200).

36394777491840 is an abundant number, since it is smaller than the sum of its proper divisors (100362323410560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

36394777491840 is an equidigital number, since it uses as much as digits as its factorization.

36394777491840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4995 (or 4965 counting only the distinct ones).

The product of its (nonzero) digits is 768144384, while the sum is 72.

The spelling of 36394777491840 in words is "thirty-six trillion, three hundred ninety-four billion, seven hundred seventy-seven million, four hundred ninety-one thousand, eight hundred forty".