631729402135 has 32 divisors (see below), whose sum is σ = 871695272448. Its totient is φ = 435847547520.

The previous prime is 631729402019. The next prime is 631729402189. The reversal of 631729402135 is 531204927136.

It is not a de Polignac number, because 631729402135 - 2²⁹ = 631192531223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 631729402091 and 631729402100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4849221 + ... + 4977790.

It is an arithmetic number, because the mean of its divisors is an integer number (27240477264).

Almost surely, 2^631729402135 is an apocalyptic number.

631729402135 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

631729402135 is a deficient number, since it is larger than the sum of its proper divisors (239965870313).

631729402135 is a wasteful number, since it uses less digits than its factorization.

631729402135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9827095.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 631729402135 in words is "six hundred thirty-one billion, seven hundred twenty-nine million, four hundred two thousand, one hundred thirty-five".