31425036644 has 12 divisors (see below), whose sum is σ = 55141253244. Its totient is φ = 15670392864.

The previous prime is 31425036641. The next prime is 31425036659. The reversal of 31425036644 is 44663052413.

It can be written as a sum of positive squares in 2 ways, for example, as 19849428544 + 11575608100 = 140888^2 + 107590^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31425036598 and 31425036607.

It is not an unprimeable number, because it can be changed into a prime (31425036641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10529687 + ... + 10532670.

It is an arithmetic number, because the mean of its divisors is an integer number (4595104437).

Almost surely, 2^31425036644 is an apocalyptic number.

It is an amenable number.

31425036644 is a deficient number, since it is larger than the sum of its proper divisors (23716216600).

31425036644 is a wasteful number, since it uses less digits than its factorization.

31425036644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21062734 (or 21062732 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 31425036644 in words is "thirty-one billion, four hundred twenty-five million, thirty-six thousand, six hundred forty-four".