125629642291 has 2 divisors, whose sum is σ = 125629642292. Its totient is φ = 125629642290.

The previous prime is 125629642279. The next prime is 125629642319. The reversal of 125629642291 is 192246926521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125629642291 - 2¹⁹ = 125629118003 is a prime.

It is not a weakly prime, because it can be changed into another prime (125629642231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62814821145 + 62814821146.

It is an arithmetic number, because the mean of its divisors is an integer number (62814821146).

Almost surely, 2^125629642291 is an apocalyptic number.

125629642291 is a deficient number, since it is larger than the sum of its proper divisors (1).

125629642291 is an equidigital number, since it uses as much as digits as its factorization.

125629642291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The spelling of 125629642291 in words is "one hundred twenty-five billion, six hundred twenty-nine million, six hundred forty-two thousand, two hundred ninety-one".