125634638420369 has 16 divisors (see below), whose sum is σ = 144288226978560. Its totient is φ = 108363403065600.

The previous prime is 125634638420359. The next prime is 125634638420371. The reversal of 125634638420369 is 963024836436521.

It is a cyclic number.

It is not a de Polignac number, because 125634638420369 - 2²⁸ = 125634369984913 is a prime.

It is a super-2 number, since 2×125634638420369² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125634638420309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2044870457 + ... + 2044931894.

It is an arithmetic number, because the mean of its divisors is an integer number (9018014186160).

Almost surely, 2^{125634638420369} is an apocalyptic number.

It is an amenable number.

125634638420369 is a deficient number, since it is larger than the sum of its proper divisors (18653588558191).

125634638420369 is a wasteful number, since it uses less digits than its factorization.

125634638420369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089802520.

The product of its (nonzero) digits is 134369280, while the sum is 62.

The spelling of 125634638420369 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-nine".