647404253564 has 12 divisors (see below), whose sum is σ = 1132987270800. Its totient is φ = 323693604768.

The previous prime is 647404253563. The next prime is 647404253579. The reversal of 647404253564 is 465352404746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647404253563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1958024 + ... + 2264655.

It is an arithmetic number, because the mean of its divisors is an integer number (94415605900).

Almost surely, 2^647404253564 is an apocalyptic number.

It is an amenable number.

647404253564 is a deficient number, since it is larger than the sum of its proper divisors (485583017236).

647404253564 is a wasteful number, since it uses less digits than its factorization.

647404253564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261012 (or 4261010 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 50.

The spelling of 647404253564 in words is "six hundred forty-seven billion, four hundred four million, two hundred fifty-three thousand, five hundred sixty-four".