64999698792 has 128 divisors (see below), whose sum is σ = 191446675200. Its totient is φ = 18001778688.

The previous prime is 64999698737. The next prime is 64999698833. The reversal of 64999698792 is 29789699946.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1652668 + ... + 1691540.

It is an arithmetic number, because the mean of its divisors is an integer number (1495677150).

Almost surely, 2^64999698792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64999698792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95723337600).

64999698792 is an abundant number, since it is smaller than the sum of its proper divisors (126446976408).

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

64999698792 is a wasteful number, since it uses less digits than its factorization.

64999698792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39195 (or 39191 counting only the distinct ones).

The product of its digits is 952342272, while the sum is 78.

The spelling of 64999698792 in words is "sixty-four billion, nine hundred ninety-nine million, six hundred ninety-eight thousand, seven hundred ninety-two".