29150725921 has 2 divisors, whose sum is σ = 29150725922. Its totient is φ = 29150725920.

The previous prime is 29150725913. The next prime is 29150725931. The reversal of 29150725921 is 12952705192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28542413025 + 608312896 = 168945^2 + 24664^2 .

It is a cyclic number.

It is not a de Polignac number, because 29150725921 - 2³ = 29150725913 is a prime.

It is a super-2 number, since 2×29150725921² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29150725931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14575362960 + 14575362961.

It is an arithmetic number, because the mean of its divisors is an integer number (14575362961).

Almost surely, 2^29150725921 is an apocalyptic number.

It is an amenable number.

29150725921 is a deficient number, since it is larger than the sum of its proper divisors (1).

29150725921 is an equidigital number, since it uses as much as digits as its factorization.

29150725921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 29150725921 in words is "twenty-nine billion, one hundred fifty million, seven hundred twenty-five thousand, nine hundred twenty-one".