31829404028661 has 12 divisors (see below), whose sum is σ = 45976175769888. Its totient is φ = 21219431939304.

The previous prime is 31829404028633. The next prime is 31829404028683. The reversal of 31829404028661 is 16682040492813.

31829404028661 is a `hidden beast` number, since 3 + 18 + 2 + 94 + 0 + 402 + 86 + 61 = 666.

It is not a de Polignac number, because 31829404028661 - 2⁷ = 31829404028533 is a prime.

It is a super-2 number, since 2×31829404028661² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31829404028598 and 31829404028607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31829404028161) 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, 13043055 + ... + 15289868.

It is an arithmetic number, because the mean of its divisors is an integer number (3831347980824).

Almost surely, 2^{31829404028661} is an apocalyptic number.

It is an amenable number.

31829404028661 is a deficient number, since it is larger than the sum of its proper divisors (14146771741227).

31829404028661 is a wasteful number, since it uses less digits than its factorization.

31829404028661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28457752 (or 28457749 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 31829404028661 in words is "thirty-one trillion, eight hundred twenty-nine billion, four hundred four million, twenty-eight thousand, six hundred sixty-one".