18147640560 has 160 divisors (see below), whose sum is σ = 66368704512. Its totient is φ = 4014213120.

The previous prime is 18147640559. The next prime is 18147640583. The reversal of 18147640560 is 6504674181.

It is a super-2 number, since 2×18147640560² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 122149 + ... + 226308.

Almost surely, 2^18147640560 is an apocalyptic number.

18147640560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18147640560 is an abundant number, since it is smaller than the sum of its proper divisors (48221063952).

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

18147640560 is a wasteful number, since it uses less digits than its factorization.

18147640560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348511 (or 348505 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 18147640560 in words is "eighteen billion, one hundred forty-seven million, six hundred forty thousand, five hundred sixty".