31145684916 has 24 divisors (see below), whose sum is σ = 74637408160. Its totient is φ = 10101303072.

The previous prime is 31145684861. The next prime is 31145684917. The reversal of 31145684916 is 61948654113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145684917) 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 7 ways as a sum of consecutive naturals, for example, 35073526 + ... + 35074413.

Almost surely, 2^31145684916 is an apocalyptic number.

It is an amenable number.

31145684916 is an abundant number, since it is smaller than the sum of its proper divisors (43491723244).

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

31145684916 is a wasteful number, since it uses less digits than its factorization.

31145684916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70147983 (or 70147981 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The spelling of 31145684916 in words is "thirty-one billion, one hundred forty-five million, six hundred eighty-four thousand, nine hundred sixteen".