647942312525 has 12 divisors (see below), whose sum is σ = 845735229600. Its totient is φ = 491072068080.

The previous prime is 647942312519. The next prime is 647942312587. The reversal of 647942312525 is 525213249746.

It is not a de Polignac number, because 647942312525 - 2¹⁸ = 647942050381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 682044065 + ... + 682045014.

It is an arithmetic number, because the mean of its divisors is an integer number (70477935800).

Almost surely, 2^647942312525 is an apocalyptic number.

It is an amenable number.

647942312525 is a deficient number, since it is larger than the sum of its proper divisors (197792917075).

647942312525 is a wasteful number, since it uses less digits than its factorization.

647942312525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364089108 (or 1364089103 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 50.

The spelling of 647942312525 in words is "six hundred forty-seven billion, nine hundred forty-two million, three hundred twelve thousand, five hundred twenty-five".