31706645475 has 12 divisors (see below), whose sum is σ = 52421653976. Its totient is φ = 16910210880.

The previous prime is 31706645473. The next prime is 31706645539. The reversal of 31706645475 is 57454660713.

It is a happy number.

It is not a de Polignac number, because 31706645475 - 2¹ = 31706645473 is a prime.

It is a super-2 number, since 2×31706645475² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31706645473) 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 11 ways as a sum of consecutive naturals, for example, 211377562 + ... + 211377711.

Almost surely, 2^31706645475 is an apocalyptic number.

31706645475 is a deficient number, since it is larger than the sum of its proper divisors (20715008501).

31706645475 is a wasteful number, since it uses less digits than its factorization.

31706645475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422755286 (or 422755281 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 48.

The spelling of 31706645475 in words is "thirty-one billion, seven hundred six million, six hundred forty-five thousand, four hundred seventy-five".