31485511663 has 2 divisors, whose sum is σ = 31485511664. Its totient is φ = 31485511662.

The previous prime is 31485511567. The next prime is 31485511703. The reversal of 31485511663 is 36611558413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31485511663 - 2²⁵ = 31451957231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31485511163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15742755831 + 15742755832.

It is an arithmetic number, because the mean of its divisors is an integer number (15742755832).

Almost surely, 2^31485511663 is an apocalyptic number.

31485511663 is a deficient number, since it is larger than the sum of its proper divisors (1).

31485511663 is an equidigital number, since it uses as much as digits as its factorization.

31485511663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 43.

The spelling of 31485511663 in words is "thirty-one billion, four hundred eighty-five million, five hundred eleven thousand, six hundred sixty-three".