64517772 has 48 divisors (see below), whose sum is σ = 164707200. Its totient is φ = 19493760.

The previous prime is 64517753. The next prime is 64517797. The reversal of 64517772 is 27771546.

It is a self number, because there is not a number n which added to its sum of digits gives 64517772.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74679 + ... + 75537.

It is an arithmetic number, because the mean of its divisors is an integer number (3431400).

Almost surely, 2^64517772 is an apocalyptic number.

It is an amenable number.

64517772 is an abundant number, since it is smaller than the sum of its proper divisors (100189428).

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

64517772 is a wasteful number, since it uses less digits than its factorization.

64517772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446 (or 1444 counting only the distinct ones).

The product of its digits is 82320, while the sum is 39.

The square root of 64517772 is about 8032.2955622910. The cubic root of 64517772 is about 401.0757957317.

The spelling of 64517772 in words is "sixty-four million, five hundred seventeen thousand, seven hundred seventy-two".