31577650873 has 2 divisors, whose sum is σ = 31577650874. Its totient is φ = 31577650872.

The previous prime is 31577650831. The next prime is 31577650891. The reversal of 31577650873 is 37805677513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29018100409 + 2559550464 = 170347^2 + 50592^2 .

It is a cyclic number.

It is not a de Polignac number, because 31577650873 - 2⁹ = 31577650361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31577650873.

It is not a weakly prime, because it can be changed into another prime (31577650813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15788825436 + 15788825437.

It is an arithmetic number, because the mean of its divisors is an integer number (15788825437).

Almost surely, 2^31577650873 is an apocalyptic number.

It is an amenable number.

31577650873 is a deficient number, since it is larger than the sum of its proper divisors (1).

31577650873 is an equidigital number, since it uses as much as digits as its factorization.

31577650873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3704400, while the sum is 52.

The spelling of 31577650873 in words is "thirty-one billion, five hundred seventy-seven million, six hundred fifty thousand, eight hundred seventy-three".