31819610641 has 12 divisors (see below), whose sum is σ = 39861930612. Its totient is φ = 25175955168.

The previous prime is 31819610633. The next prime is 31819610699. The reversal of 31819610641 is 14601691813.

It can be written as a sum of positive squares in 2 ways, for example, as 16180857616 + 15638753025 = 127204^2 + 125055^2 .

It is not a de Polignac number, because 31819610641 - 2³ = 31819610633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31819610594 and 31819610603.

It is not an unprimeable number, because it can be changed into a prime (31819610041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24975510 + ... + 24976783.

It is an arithmetic number, because the mean of its divisors is an integer number (3321827551).

Almost surely, 2^31819610641 is an apocalyptic number.

It is an amenable number.

31819610641 is a deficient number, since it is larger than the sum of its proper divisors (8042319971).

31819610641 is a wasteful number, since it uses less digits than its factorization.

31819610641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49952320 (or 49952313 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 31819610641 in words is "thirty-one billion, eight hundred nineteen million, six hundred ten thousand, six hundred forty-one".