1236421149840 has 320 divisors, whose sum is σ = 4538287507200. Its totient is φ = 312358187520.

The previous prime is 1236421149829. The next prime is 1236421149853. The reversal of 1236421149840 is 489411246321.

1236421149840 is a `hidden beast` number, since 1 + 2 + 3 + 6 + 421 + 149 + 84 + 0 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3138270 + ... + 3510210.

It is an arithmetic number, because the mean of its divisors is an integer number (14182148460).

Almost surely, 2^{1236421149840} is an apocalyptic number.

1236421149840 is a gapful number since it is divisible by the number (10) 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 1236421149840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2269143753600).

1236421149840 is an abundant number, since it is smaller than the sum of its proper divisors (3301866357360).

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

1236421149840 is an equidigital number, since it uses as much as digits as its factorization.

1236421149840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371994 (or 371970 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 1236421149840 in words is "one trillion, two hundred thirty-six billion, four hundred twenty-one million, one hundred forty-nine thousand, eight hundred forty".