647495544 has 16 divisors (see below), whose sum is σ = 1618738920. Its totient is φ = 215831840.

The previous prime is 647495503. The next prime is 647495561. The reversal of 647495544 is 445594746.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 647495493 and 647495502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13489467 + ... + 13489514.

Almost surely, 2^647495544 is an apocalyptic number.

It is an amenable number.

647495544 is an abundant number, since it is smaller than the sum of its proper divisors (971243376).

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

647495544 is a wasteful number, since it uses less digits than its factorization.

647495544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26978990 (or 26978986 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 48.

The square root of 647495544 is about 25445.9337419557. The cubic root of 647495544 is about 865.1251309727.

The spelling of 647495544 in words is "six hundred forty-seven million, four hundred ninety-five thousand, five hundred forty-four".