29957856243 has 16 divisors (see below), whose sum is σ = 45660683520. Its totient is φ = 17114793696.

The previous prime is 29957856211. The next prime is 29957856251. The reversal of 29957856243 is 34265875992.

It is not a de Polignac number, because 29957856243 - 2⁵ = 29957856211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29957854243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72213 + ... + 255206.

It is an arithmetic number, because the mean of its divisors is an integer number (2853792720).

Almost surely, 2^29957856243 is an apocalyptic number.

29957856243 is a deficient number, since it is larger than the sum of its proper divisors (15702827277).

29957856243 is a wasteful number, since it uses less digits than its factorization.

29957856243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331786.

The product of its digits is 32659200, while the sum is 60.

The spelling of 29957856243 in words is "twenty-nine billion, nine hundred fifty-seven million, eight hundred fifty-six thousand, two hundred forty-three".