71939165925 has 24 divisors (see below), whose sum is σ = 129752097120. Its totient is φ = 34879595200.

The previous prime is 71939165873. The next prime is 71939165933. The reversal of 71939165925 is 52956193917.

It is not a de Polignac number, because 71939165925 - 2²⁷ = 71804948197 is a prime.

It is a super-2 number, since 2×71939165925² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43598670 + ... + 43600319.

It is an arithmetic number, because the mean of its divisors is an integer number (5406337380).

Almost surely, 2^71939165925 is an apocalyptic number.

71939165925 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71939165925 is a deficient number, since it is larger than the sum of its proper divisors (57812931195).

71939165925 is a wasteful number, since it uses less digits than its factorization.

71939165925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87199013 (or 87199008 counting only the distinct ones).

The product of its digits is 4592700, while the sum is 57.

The spelling of 71939165925 in words is "seventy-one billion, nine hundred thirty-nine million, one hundred sixty-five thousand, nine hundred twenty-five".