161618426560 has 56 divisors (see below), whose sum is σ = 385565666256. Its totient is φ = 64527805440.

The previous prime is 161618426549. The next prime is 161618426579. The reversal of 161618426560 is 65624816161.

It is a super-2 number, since 2×161618426560² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 161618426560.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293662 + ... + 639901.

Almost surely, 2^161618426560 is an apocalyptic number.

161618426560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161618426560 is an abundant number, since it is smaller than the sum of its proper divisors (223947239696).

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

161618426560 is an equidigital number, since it uses as much as digits as its factorization.

161618426560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934121 (or 934111 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 161618426560 in words is "one hundred sixty-one billion, six hundred eighteen million, four hundred twenty-six thousand, five hundred sixty".