31404411618 has 16 divisors (see below), whose sum is σ = 63395822880. Its totient is φ = 10370303936.

The previous prime is 31404411613. The next prime is 31404411653. The reversal of 31404411618 is 81611440413.

It is not an unprimeable number, because it can be changed into a prime (31404411613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24457623 + ... + 24458906.

It is an arithmetic number, because the mean of its divisors is an integer number (3962238930).

Almost surely, 2^31404411618 is an apocalyptic number.

31404411618 is an abundant number, since it is smaller than the sum of its proper divisors (31991411262).

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

31404411618 is a wasteful number, since it uses less digits than its factorization.

31404411618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48916641.

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 31404411618 in words is "thirty-one billion, four hundred four million, four hundred eleven thousand, six hundred eighteen".