647523643632 has 80 divisors (see below), whose sum is σ = 1828302124032. Its totient is φ = 196591610880.

The previous prime is 647523643621. The next prime is 647523643661. The reversal of 647523643632 is 236346325746.

It is a super-2 number, since 2×647523643632² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12773638 + ... + 12824229.

Almost surely, 2^647523643632 is an apocalyptic number.

647523643632 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

647523643632 is an abundant number, since it is smaller than the sum of its proper divisors (1180778480400).

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

647523643632 is a wasteful number, since it uses less digits than its factorization.

647523643632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25597926 (or 25597920 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 51.

The spelling of 647523643632 in words is "six hundred forty-seven billion, five hundred twenty-three million, six hundred forty-three thousand, six hundred thirty-two".