634528929247 has 4 divisors (see below), whose sum is σ = 654997604416. Its totient is φ = 614060254080.

The previous prime is 634528929169. The next prime is 634528929253. The reversal of 634528929247 is 742929825436.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 634528929247 - 2¹⁵ = 634528896479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634528923247) 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, 10234337538 + ... + 10234337599.

It is an arithmetic number, because the mean of its divisors is an integer number (163749401104).

Almost surely, 2^634528929247 is an apocalyptic number.

634528929247 is a deficient number, since it is larger than the sum of its proper divisors (20468675169).

634528929247 is a wasteful number, since it uses less digits than its factorization.

634528929247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20468675168.

The product of its digits is 52254720, while the sum is 61.

The spelling of 634528929247 in words is "six hundred thirty-four billion, five hundred twenty-eight million, nine hundred twenty-nine thousand, two hundred forty-seven".