71919187925 has 36 divisors (see below), whose sum is σ = 96799238604. Its totient is φ = 52982092800.

The previous prime is 71919187909. The next prime is 71919187927. The reversal of 71919187925 is 52978191917.

It can be written as a sum of positive squares in 18 ways, for example, as 65499653041 + 6419534884 = 255929^2 + 80122^2 .

It is not a de Polignac number, because 71919187925 - 2⁴ = 71919187909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71919187927) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1758509 + ... + 1798941.

It is an arithmetic number, because the mean of its divisors is an integer number (2688867739).

Almost surely, 2^71919187925 is an apocalyptic number.

It is an amenable number.

71919187925 is a deficient number, since it is larger than the sum of its proper divisors (24880050679).

71919187925 is a wasteful number, since it uses less digits than its factorization.

71919187925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40890 (or 40872 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 59.

The spelling of 71919187925 in words is "seventy-one billion, nine hundred nineteen million, one hundred eighty-seven thousand, nine hundred twenty-five".