125629642191 has 8 divisors (see below), whose sum is σ = 170252192944. Its totient is φ = 82380093120.

The previous prime is 125629642181. The next prime is 125629642199. The reversal of 125629642191 is 191246926521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125629642191 - 2¹⁵ = 125629609423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125629642191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125629642199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343250206 + ... + 343250571.

It is an arithmetic number, because the mean of its divisors is an integer number (21281524118).

Almost surely, 2^125629642191 is an apocalyptic number.

125629642191 is a deficient number, since it is larger than the sum of its proper divisors (44622550753).

125629642191 is an equidigital number, since it uses as much as digits as its factorization.

125629642191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686500841.

The product of its digits is 466560, while the sum is 48.

The spelling of 125629642191 in words is "one hundred twenty-five billion, six hundred twenty-nine million, six hundred forty-two thousand, one hundred ninety-one".