125402644605361 has 4 divisors (see below), whose sum is σ = 126171985983472. Its totient is φ = 124633303227252.

The previous prime is 125402644605289. The next prime is 125402644605409. The reversal of 125402644605361 is 163506446204521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125402644605361 - 2²⁷ = 125402510387633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125402644605461) 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, 384670688811 + ... + 384670689136.

It is an arithmetic number, because the mean of its divisors is an integer number (31542996495868).

Almost surely, 2^{125402644605361} is an apocalyptic number.

It is an amenable number.

125402644605361 is a deficient number, since it is larger than the sum of its proper divisors (769341378111).

125402644605361 is an equidigital number, since it uses as much as digits as its factorization.

125402644605361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769341378110.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 125402644605361 in words is "one hundred twenty-five trillion, four hundred two billion, six hundred forty-four million, six hundred five thousand, three hundred sixty-one".