64690922016 has 216 divisors, whose sum is σ = 217252893312. Its totient is φ = 17886355200.

The previous prime is 64690921993. The next prime is 64690922027. The reversal of 64690922016 is 61022909646.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1920681 + ... + 1954071.

It is an arithmetic number, because the mean of its divisors is an integer number (1005800432).

Almost surely, 2^64690922016 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 64690922016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108626446656).

64690922016 is an abundant number, since it is smaller than the sum of its proper divisors (152561971296).

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

64690922016 is a wasteful number, since it uses less digits than its factorization.

64690922016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33476 (or 33434 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 64690922016 in words is "sixty-four billion, six hundred ninety million, nine hundred twenty-two thousand, sixteen".