13181445422640 has 160 divisors (see below), whose sum is σ = 49530279859200. Its totient is φ = 3195501914880.

The previous prime is 13181445422617. The next prime is 13181445422819. The reversal of 13181445422640 is 4622454418131.

13181445422640 is a `hidden beast` number, since 1 + 3 + 1 + 8 + 1 + 44 + 542 + 2 + 64 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277363560 + ... + 277411079.

It is an arithmetic number, because the mean of its divisors is an integer number (309564249120).

Almost surely, 2^{13181445422640} is an apocalyptic number.

13181445422640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13181445422640 is an abundant number, since it is smaller than the sum of its proper divisors (36348834436560).

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

13181445422640 is a wasteful number, since it uses less digits than its factorization.

13181445422640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554774672 (or 554774660 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The spelling of 13181445422640 in words is "thirteen trillion, one hundred eighty-one billion, four hundred forty-five million, four hundred twenty-two thousand, six hundred forty".