125621956735 has 16 divisors (see below), whose sum is σ = 169755420672. Its totient is φ = 88414279200.

The previous prime is 125621956721. The next prime is 125621956741. The reversal of 125621956735 is 537659126521.

It is not a de Polignac number, because 125621956735 - 2¹⁵ = 125621923967 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36837579 + ... + 36840988.

It is an arithmetic number, because the mean of its divisors is an integer number (10609713792).

Almost surely, 2^125621956735 is an apocalyptic number.

125621956735 is a deficient number, since it is larger than the sum of its proper divisors (44133463937).

125621956735 is a wasteful number, since it uses less digits than its factorization.

125621956735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73678614.

The product of its digits is 3402000, while the sum is 52.

The spelling of 125621956735 in words is "one hundred twenty-five billion, six hundred twenty-one million, nine hundred fifty-six thousand, seven hundred thirty-five".