29816331381 has 24 divisors (see below), whose sum is σ = 45471822240. Its totient is φ = 18774439200.

The previous prime is 29816331367. The next prime is 29816331383. The reversal of 29816331381 is 18313361892.

29816331381 is a `hidden beast` number, since 2 + 9 + 8 + 1 + 633 + 1 + 3 + 8 + 1 = 666.

It is not a de Polignac number, because 29816331381 - 2²² = 29812137077 is a prime.

It is a super-2 number, since 2×29816331381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29816331383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206790 + ... + 319991.

It is an arithmetic number, because the mean of its divisors is an integer number (1894659260).

Almost surely, 2^29816331381 is an apocalyptic number.

It is an amenable number.

29816331381 is a deficient number, since it is larger than the sum of its proper divisors (15655490859).

29816331381 is a wasteful number, since it uses less digits than its factorization.

29816331381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527137 (or 527134 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The spelling of 29816331381 in words is "twenty-nine billion, eight hundred sixteen million, three hundred thirty-one thousand, three hundred eighty-one".