64472681 has 32 divisors (see below), whose sum is σ = 85344000. Its totient is φ = 48263040.

The previous prime is 64472671. The next prime is 64472701. The reversal of 64472681 is 18627446.

It is not a de Polignac number, because 64472681 - 2¹⁴ = 64456297 is a prime.

It is a super-2 number, since 2×64472681² = 8313453190655522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64472641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84341 + ... + 85101.

It is an arithmetic number, because the mean of its divisors is an integer number (2667000).

Almost surely, 2^64472681 is an apocalyptic number.

It is an amenable number.

64472681 is a deficient number, since it is larger than the sum of its proper divisors (20871319).

64472681 is a wasteful number, since it uses less digits than its factorization.

64472681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 800 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 64472681 is about 8029.4882153223. The cubic root of 64472681 is about 400.9823376404.

The spelling of 64472681 in words is "sixty-four million, four hundred seventy-two thousand, six hundred eighty-one".