125908929839 has 96 divisors (see below), whose sum is σ = 169637732352. Its totient is φ = 90751752000.

The previous prime is 125908929799. The next prime is 125908929851. The reversal of 125908929839 is 938929809521.

It is not a de Polignac number, because 125908929839 - 2¹⁶ = 125908864303 is a prime.

It is a super-2 number, since 2×125908929839² (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 (125908928839) 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 95 ways as a sum of consecutive naturals, for example, 258539654 + ... + 258540140.

It is an arithmetic number, because the mean of its divisors is an integer number (1767059712).

Almost surely, 2^125908929839 is an apocalyptic number.

125908929839 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

125908929839 is a deficient number, since it is larger than the sum of its proper divisors (43728802513).

125908929839 is a wasteful number, since it uses less digits than its factorization.

125908929839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 65.

The spelling of 125908929839 in words is "one hundred twenty-five billion, nine hundred eight million, nine hundred twenty-nine thousand, eight hundred thirty-nine".