64996153920 has 224 divisors, whose sum is σ = 233052762240. Its totient is φ = 17048033280.

The previous prime is 64996153919. The next prime is 64996153949. The reversal of 64996153920 is 2935169946.

64996153920 is a `hidden beast` number, since 6 + 49 + 9 + 61 + 539 + 2 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 465379 + ... + 588701.

Almost surely, 2^64996153920 is an apocalyptic number.

64996153920 is a gapful number since it is divisible by the number (60) 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 64996153920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116526381120).

64996153920 is an abundant number, since it is smaller than the sum of its proper divisors (168056608320).

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

64996153920 is a wasteful number, since it uses less digits than its factorization.

64996153920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123410 (or 123394 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The spelling of 64996153920 in words is "sixty-four billion, nine hundred ninety-six million, one hundred fifty-three thousand, nine hundred twenty".