647735591472 has 40 divisors (see below), whose sum is σ = 1771747355376. Its totient is φ = 203211165696.

The previous prime is 647735591417. The next prime is 647735591497. The reversal of 647735591472 is 274195537746.

It is a super-2 number, since 2×647735591472² (a number of 24 digits) contains 22 as substring.

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, 396895993 + ... + 396897624.

Almost surely, 2^647735591472 is an apocalyptic number.

It is an amenable number.

647735591472 is an abundant number, since it is smaller than the sum of its proper divisors (1124011763904).

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

647735591472 is a wasteful number, since it uses less digits than its factorization.

647735591472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793793645 (or 793793639 counting only the distinct ones).

The product of its digits is 44452800, while the sum is 60.

The spelling of 647735591472 in words is "six hundred forty-seven billion, seven hundred thirty-five million, five hundred ninety-one thousand, four hundred seventy-two".