125868493621 has 8 divisors (see below), whose sum is σ = 142684932320. Its totient is φ = 110071233072.

The previous prime is 125868493613. The next prime is 125868493643. The reversal of 125868493621 is 126394868521.

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

It is a cyclic number.

It is not a de Polignac number, because 125868493621 - 2³ = 125868493613 is a prime.

It is the 354780-th Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125868493601) by changing a digit.

It is a nontrivial repunit in base 354779.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254794275 + ... + 254794768.

It is an arithmetic number, because the mean of its divisors is an integer number (17835616540).

Almost surely, 2^125868493621 is an apocalyptic number.

It is an amenable number.

125868493621 is a deficient number, since it is larger than the sum of its proper divisors (16816438699).

125868493621 is a wasteful number, since it uses less digits than its factorization.

125868493621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509589075.

The product of its digits is 4976640, while the sum is 55.

The spelling of 125868493621 in words is "one hundred twenty-five billion, eight hundred sixty-eight million, four hundred ninety-three thousand, six hundred twenty-one".