31451742664 has 16 divisors (see below), whose sum is σ = 60874341120. Its totient is φ = 15218585040.

The previous prime is 31451742643. The next prime is 31451742667. The reversal of 31451742664 is 46624715413.

It is a super-3 number, since 3×31451742664³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31451742664.

It is not an unprimeable number, because it can be changed into a prime (31451742667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63410524 + ... + 63411019.

It is an arithmetic number, because the mean of its divisors is an integer number (3804646320).

Almost surely, 2^31451742664 is an apocalyptic number.

It is an amenable number.

31451742664 is a deficient number, since it is larger than the sum of its proper divisors (29422598456).

31451742664 is a wasteful number, since it uses less digits than its factorization.

31451742664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126821580 (or 126821576 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The spelling of 31451742664 in words is "thirty-one billion, four hundred fifty-one million, seven hundred forty-two thousand, six hundred sixty-four".