634409523517 has 12 divisors (see below), whose sum is σ = 805076279136. Its totient is φ = 494345082840.

The previous prime is 634409523493. The next prime is 634409523541. The reversal of 634409523517 is 715325904436.

634409523517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (634409523493) and next prime (634409523541).

It is not a de Polignac number, because 634409523517 - 2¹⁵ = 634409490749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634409523547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 588505513 + ... + 588506590.

It is an arithmetic number, because the mean of its divisors is an integer number (67089689928).

Almost surely, 2^634409523517 is an apocalyptic number.

It is an amenable number.

634409523517 is a deficient number, since it is larger than the sum of its proper divisors (170666755619).

634409523517 is a wasteful number, since it uses less digits than its factorization.

634409523517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177012128 (or 1177012121 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 634409523517 in words is "six hundred thirty-four billion, four hundred nine million, five hundred twenty-three thousand, five hundred seventeen".