31724526641 has 2 divisors, whose sum is σ = 31724526642. Its totient is φ = 31724526640.

The previous prime is 31724526623. The next prime is 31724526719. The reversal of 31724526641 is 14662542713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30798846016 + 925680625 = 175496^2 + 30425^2 .

It is a cyclic number.

It is not a de Polignac number, because 31724526641 - 2⁶ = 31724526577 is a prime.

It is not a weakly prime, because it can be changed into another prime (31724526601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15862263320 + 15862263321.

It is an arithmetic number, because the mean of its divisors is an integer number (15862263321).

Almost surely, 2^31724526641 is an apocalyptic number.

It is an amenable number.

31724526641 is a deficient number, since it is larger than the sum of its proper divisors (1).

31724526641 is an equidigital number, since it uses as much as digits as its factorization.

31724526641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 41.

The spelling of 31724526641 in words is "thirty-one billion, seven hundred twenty-four million, five hundred twenty-six thousand, six hundred forty-one".