125634638420367 has 4 divisors (see below), whose sum is σ = 167512851227160. Its totient is φ = 83756425613576.

The previous prime is 125634638420359. The next prime is 125634638420371. The reversal of 125634638420367 is 763024836436521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125634638420367 - 2³ = 125634638420359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125634638420367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125634638420377) 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, 20939106403392 + ... + 20939106403397.

It is an arithmetic number, because the mean of its divisors is an integer number (41878212806790).

Almost surely, 2^{125634638420367} is an apocalyptic number.

125634638420367 is a deficient number, since it is larger than the sum of its proper divisors (41878212806793).

125634638420367 is an equidigital number, since it uses as much as digits as its factorization.

125634638420367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41878212806792.

The product of its (nonzero) digits is 104509440, while the sum is 60.

The spelling of 125634638420367 in words is "one hundred twenty-five trillion, six hundred thirty-four billion, six hundred thirty-eight million, four hundred twenty thousand, three hundred sixty-seven".