647542278948 has 24 divisors (see below), whose sum is σ = 1532212718400. Its totient is φ = 212807321440.

The previous prime is 647542278881. The next prime is 647542278953. The reversal of 647542278948 is 849872245746.

It is a super-2 number, since 2×647542278948² (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, 380012223 + ... + 380013926.

It is an arithmetic number, because the mean of its divisors is an integer number (63842196600).

Almost surely, 2^647542278948 is an apocalyptic number.

It is an amenable number.

647542278948 is an abundant number, since it is smaller than the sum of its proper divisors (884670439452).

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

647542278948 is a wasteful number, since it uses less digits than its factorization.

647542278948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760026227 (or 760026225 counting only the distinct ones).

The product of its digits is 216760320, while the sum is 66.

The spelling of 647542278948 in words is "six hundred forty-seven billion, five hundred forty-two million, two hundred seventy-eight thousand, nine hundred forty-eight".