18291431546064 has 60 divisors (see below), whose sum is σ = 53086551854336. Its totient is φ = 6097143847392.

The previous prime is 18291431546039. The next prime is 18291431546081. The reversal of 18291431546064 is 46064513419281.

18291431546064 is a `hidden beast` number, since 1 + 8 + 2 + 9 + 1 + 4 + 31 + 546 + 0 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 18291431546064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2352289264 + ... + 2352297039.

Almost surely, 2^{18291431546064} is an apocalyptic number.

It is an amenable number.

18291431546064 is an abundant number, since it is smaller than the sum of its proper divisors (34795120308272).

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

18291431546064 is an equidigital number, since it uses as much as digits as its factorization.

18291431546064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704586326 (or 4704586308 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 18291431546064 in words is "eighteen trillion, two hundred ninety-one billion, four hundred thirty-one million, five hundred forty-six thousand, sixty-four".