31610664677 has 4 divisors (see below), whose sum is σ = 31936547916. Its totient is φ = 31284781440.

The previous prime is 31610664607. The next prime is 31610664697. The reversal of 31610664677 is 77646601613.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23469933601 + 8140731076 = 153199^2 + 90226^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31610664677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31610664607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162941474 + ... + 162941667.

It is an arithmetic number, because the mean of its divisors is an integer number (7984136979).

Almost surely, 2^31610664677 is an apocalyptic number.

It is an amenable number.

31610664677 is a deficient number, since it is larger than the sum of its proper divisors (325883239).

31610664677 is an equidigital number, since it uses as much as digits as its factorization.

31610664677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325883238.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 31610664677 in words is "thirty-one billion, six hundred ten million, six hundred sixty-four thousand, six hundred seventy-seven".