64456641522 has 48 divisors (see below), whose sum is σ = 171884381760. Its totient is φ = 16999553376.

The previous prime is 64456641493. The next prime is 64456641527. The reversal of 64456641522 is 22514665446.

64456641522 is a `hidden beast` number, since 6 + 44 + 566 + 41 + 5 + 2 + 2 = 666.

It is a super-2 number, since 2×64456641522² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64456641527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19673772 + ... + 19677047.

It is an arithmetic number, because the mean of its divisors is an integer number (3580924620).

Almost surely, 2^64456641522 is an apocalyptic number.

64456641522 is an abundant number, since it is smaller than the sum of its proper divisors (107427740238).

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

64456641522 is a wasteful number, since it uses less digits than its factorization.

64456641522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39350847 (or 39350844 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The spelling of 64456641522 in words is "sixty-four billion, four hundred fifty-six million, six hundred forty-one thousand, five hundred twenty-two".