647864231475 has 24 divisors (see below), whose sum is σ = 1134143503920. Its totient is φ = 325202437120.

The previous prime is 647864231467. The next prime is 647864231513. The reversal of 647864231475 is 574132468746.

It is not a de Polignac number, because 647864231475 - 2³ = 647864231467 is a prime.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254063130 + ... + 254065679.

It is an arithmetic number, because the mean of its divisors is an integer number (47255979330).

Almost surely, 2^647864231475 is an apocalyptic number.

647864231475 is a deficient number, since it is larger than the sum of its proper divisors (486279272445).

647864231475 is a wasteful number, since it uses less digits than its factorization.

647864231475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508128839 (or 508128834 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 57.

The spelling of 647864231475 in words is "six hundred forty-seven billion, eight hundred sixty-four million, two hundred thirty-one thousand, four hundred seventy-five".