31662778485 has 16 divisors (see below), whose sum is σ = 54557403264. Its totient is φ = 15587829312.

The previous prime is 31662778457. The next prime is 31662778501. The reversal of 31662778485 is 58487726613.

It is not a de Polignac number, because 31662778485 - 2¹⁴ = 31662762101 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 81186417 + ... + 81186806.

It is an arithmetic number, because the mean of its divisors is an integer number (3409837704).

Almost surely, 2^31662778485 is an apocalyptic number.

It is an amenable number.

31662778485 is a deficient number, since it is larger than the sum of its proper divisors (22894624779).

31662778485 is a wasteful number, since it uses less digits than its factorization.

31662778485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162373244.

The product of its digits is 13547520, while the sum is 57.

The spelling of 31662778485 in words is "thirty-one billion, six hundred sixty-two million, seven hundred seventy-eight thousand, four hundred eighty-five".