31605666342 has 32 divisors (see below), whose sum is σ = 64583488512. Its totient is φ = 10306718784.

The previous prime is 31605666319. The next prime is 31605666373. The reversal of 31605666342 is 24366650613.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31605666294 and 31605666303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 683458 + ... + 728234.

It is an arithmetic number, because the mean of its divisors is an integer number (2018234016).

Almost surely, 2^31605666342 is an apocalyptic number.

31605666342 is an abundant number, since it is smaller than the sum of its proper divisors (32977822170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31605666342 is a wasteful number, since it uses less digits than its factorization.

31605666342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47332.

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 31605666342 in words is "thirty-one billion, six hundred five million, six hundred sixty-six thousand, three hundred forty-two".