36641989440 has 784 divisors, whose sum is σ = 157511617920. Its totient is φ = 7927787520.

The previous prime is 36641989399. The next prime is 36641989463. The reversal of 36641989440 is 4498914663.

It is a happy number.

36641989440 is a `hidden beast` number, since 3 + 6 + 6 + 4 + 198 + 9 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 31025650 + ... + 31026830.

Almost surely, 2^36641989440 is an apocalyptic number.

36641989440 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 36641989440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78755808960).

36641989440 is an abundant number, since it is smaller than the sum of its proper divisors (120869628480).

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

36641989440 is a wasteful number, since it uses less digits than its factorization.

36641989440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242 (or 1217 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 36641989440 in words is "thirty-six billion, six hundred forty-one million, nine hundred eighty-nine thousand, four hundred forty".