31120140164 has 6 divisors (see below), whose sum is σ = 54460245294. Its totient is φ = 15560070080.

The previous prime is 31120140151. The next prime is 31120140229. The reversal of 31120140164 is 46104102113.

It can be written as a sum of positive squares in only one way, i.e., 31114137664 + 6002500 = 176392^2 + 2450^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3890017517 + ... + 3890017524.

It is an arithmetic number, because the mean of its divisors is an integer number (9076707549).

Almost surely, 2^31120140164 is an apocalyptic number.

It is an amenable number.

31120140164 is a deficient number, since it is larger than the sum of its proper divisors (23340105130).

31120140164 is a wasteful number, since it uses less digits than its factorization.

31120140164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7780035045 (or 7780035043 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 31120140164 its reverse (46104102113), we get a palindrome (77224242277).

The spelling of 31120140164 in words is "thirty-one billion, one hundred twenty million, one hundred forty thousand, one hundred sixty-four".