29139494688 has 84 divisors (see below), whose sum is σ = 86013291798. Its totient is φ = 9713157120.

The previous prime is 29139494663. The next prime is 29139494693. The reversal of 29139494688 is 88649493192.

29139494688 is a `hidden beast` number, since 2 + 9 + 139 + 494 + 6 + 8 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28713980304 + 425514384 = 169452^2 + 20628^2 .

It is a super-2 number, since 2×29139494688² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 601233 + ... + 647888.

Almost surely, 2^29139494688 is an apocalyptic number.

It is an amenable number.

29139494688 is an abundant number, since it is smaller than the sum of its proper divisors (56873797110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29139494688 is an equidigital number, since it uses as much as digits as its factorization.

29139494688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249149 (or 1249126 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The spelling of 29139494688 in words is "twenty-nine billion, one hundred thirty-nine million, four hundred ninety-four thousand, six hundred eighty-eight".