18196747136640 has 96 divisors (see below), whose sum is σ = 62835642476100. Its totient is φ = 4852465901568.

The previous prime is 18196747136599. The next prime is 18196747136657. The reversal of 18196747136640 is 4663174769181.

18196747136640 is a `hidden beast` number, since 1 + 8 + 1 + 9 + 67 + 471 + 3 + 66 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15337374359616 + 2859372777024 = 3916296^2 + 1690968^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×18196747136640² (a number of 27 digits) contains 22 as substring.

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, 1579572985 + ... + 1579584504.

Almost surely, 2^{18196747136640} is an apocalyptic number.

18196747136640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18196747136640 is an abundant number, since it is smaller than the sum of its proper divisors (44638895339460).

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

18196747136640 is a wasteful number, since it uses less digits than its factorization.

18196747136640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159157514 (or 3159157499 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 18196747136640 in words is "eighteen trillion, one hundred ninety-six billion, seven hundred forty-seven million, one hundred thirty-six thousand, six hundred forty".