29138911657 has 4 divisors (see below), whose sum is σ = 29507758720. Its totient is φ = 28770064596.

The previous prime is 29138911619. The next prime is 29138911673. The reversal of 29138911657 is 75611983192.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29138911657 - 2¹⁵ = 29138878889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29138911757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184423413 + ... + 184423570.

It is an arithmetic number, because the mean of its divisors is an integer number (7376939680).

Almost surely, 2^29138911657 is an apocalyptic number.

It is an amenable number.

29138911657 is a deficient number, since it is larger than the sum of its proper divisors (368847063).

29138911657 is an equidigital number, since it uses as much as digits as its factorization.

29138911657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368847062.

The product of its digits is 816480, while the sum is 52.

The spelling of 29138911657 in words is "twenty-nine billion, one hundred thirty-eight million, nine hundred eleven thousand, six hundred fifty-seven".