125321613759 has 12 divisors (see below), whose sum is σ = 181082374200. Its totient is φ = 83519004624.

The previous prime is 125321613743. The next prime is 125321613773. The reversal of 125321613759 is 957316123521.

125321613759 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 21 + 613 + 7 + 5 + 9 = 666.

It is not a de Polignac number, because 125321613759 - 2⁴ = 125321613743 is a prime.

It is a super-2 number, since 2×125321613759² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125321613779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2367189 + ... + 2419550.

It is an arithmetic number, because the mean of its divisors is an integer number (15090197850).

Almost surely, 2^125321613759 is an apocalyptic number.

125321613759 is a deficient number, since it is larger than the sum of its proper divisors (55760760441).

125321613759 is a wasteful number, since it uses less digits than its factorization.

125321613759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4789654 (or 4789651 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The spelling of 125321613759 in words is "one hundred twenty-five billion, three hundred twenty-one million, six hundred thirteen thousand, seven hundred fifty-nine".