64520694722 has 48 divisors (see below), whose sum is σ = 112042072800. Its totient is φ = 27768153600.

The previous prime is 64520694649. The next prime is 64520694737. The reversal of 64520694722 is 22749602546.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11855522 + ... + 11860962.

It is an arithmetic number, because the mean of its divisors is an integer number (2334209850).

Almost surely, 2^64520694722 is an apocalyptic number.

64520694722 is a deficient number, since it is larger than the sum of its proper divisors (47521378078).

64520694722 is a wasteful number, since it uses less digits than its factorization.

64520694722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8063 (or 8052 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 64520694722 in words is "sixty-four billion, five hundred twenty million, six hundred ninety-four thousand, seven hundred twenty-two".