161056660550 has 24 divisors (see below), whose sum is σ = 309895232400. Its totient is φ = 62201192480.

The previous prime is 161056660549. The next prime is 161056660561. The reversal of 161056660550 is 55066650161.

It is a junction number, because it is equal to n+sod(n) for n = 161056660498 and 161056660507.

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, 55535330 + ... + 55538229.

It is an arithmetic number, because the mean of its divisors is an integer number (12912301350).

Almost surely, 2^161056660550 is an apocalyptic number.

161056660550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161056660550 is a deficient number, since it is larger than the sum of its proper divisors (148838571850).

161056660550 is a wasteful number, since it uses less digits than its factorization.

161056660550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111073600 (or 111073595 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 161056660550 in words is "one hundred sixty-one billion, fifty-six million, six hundred sixty thousand, five hundred fifty".