71631273625 has 16 divisors (see below), whose sum is σ = 89406744336. Its totient is φ = 57298022400.

The previous prime is 71631273587. The next prime is 71631273641. The reversal of 71631273625 is 52637213617.

It can be written as a sum of positive squares in 8 ways, for example, as 237036816 + 71394236809 = 15396^2 + 267197^2 .

It is not a de Polignac number, because 71631273625 - 2⁹ = 71631273113 is a prime.

It is a super-2 number, since 2×71631273625² (a number of 23 digits) contains 22 as substring.

It is a Duffinian 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, 1153879 + ... + 1214371.

It is an arithmetic number, because the mean of its divisors is an integer number (5587921521).

Almost surely, 2^71631273625 is an apocalyptic number.

It is an amenable number.

71631273625 is a deficient number, since it is larger than the sum of its proper divisors (17775470711).

71631273625 is an equidigital number, since it uses as much as digits as its factorization.

71631273625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69981 (or 69971 counting only the distinct ones).

The product of its digits is 317520, while the sum is 43.

The spelling of 71631273625 in words is "seventy-one billion, six hundred thirty-one million, two hundred seventy-three thousand, six hundred twenty-five".