29979135815 has 16 divisors (see below), whose sum is σ = 37092629376. Its totient is φ = 23246714400.

The previous prime is 29979135803. The next prime is 29979135821. The reversal of 29979135815 is 51853197992.

It is not a de Polignac number, because 29979135815 - 2³² = 25684168519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 504041 + ... + 560370.

It is an arithmetic number, because the mean of its divisors is an integer number (2318289336).

Almost surely, 2^29979135815 is an apocalyptic number.

29979135815 is a deficient number, since it is larger than the sum of its proper divisors (7113493561).

29979135815 is a wasteful number, since it uses less digits than its factorization.

29979135815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064590.

The product of its digits is 6123600, while the sum is 59.

The spelling of 29979135815 in words is "twenty-nine billion, nine hundred seventy-nine million, one hundred thirty-five thousand, eight hundred fifteen".