64516423272 has 32 divisors (see below), whose sum is σ = 184332638400. Its totient is φ = 18433263744.

The previous prime is 64516423267. The next prime is 64516423319. The reversal of 64516423272 is 27232461546.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192012997 + ... + 192013332.

It is an arithmetic number, because the mean of its divisors is an integer number (5760394950).

Almost surely, 2^64516423272 is an apocalyptic number.

It is an amenable number.

64516423272 is an abundant number, since it is smaller than the sum of its proper divisors (119816215128).

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

64516423272 is a wasteful number, since it uses less digits than its factorization.

64516423272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384026345 (or 384026341 counting only the distinct ones).

The product of its digits is 483840, while the sum is 42.

The spelling of 64516423272 in words is "sixty-four billion, five hundred sixteen million, four hundred twenty-three thousand, two hundred seventy-two".