31604621604559 has 2 divisors, whose sum is σ = 31604621604560. Its totient is φ = 31604621604558.

The previous prime is 31604621604533. The next prime is 31604621604629. The reversal of 31604621604559 is 95540612640613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31604621604559 - 2⁴¹ = 29405598349007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31604621604509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15802310802279 + 15802310802280.

It is an arithmetic number, because the mean of its divisors is an integer number (15802310802280).

Almost surely, 2^{31604621604559} is an apocalyptic number.

31604621604559 is a deficient number, since it is larger than the sum of its proper divisors (1).

31604621604559 is an equidigital number, since it uses as much as digits as its factorization.

31604621604559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 31604621604559 in words is "thirty-one trillion, six hundred four billion, six hundred twenty-one million, six hundred four thousand, five hundred fifty-nine".