161375575554 has 24 divisors (see below), whose sum is σ = 359097002940. Its totient is φ = 52338024288.

The previous prime is 161375575531. The next prime is 161375575577. The reversal of 161375575554 is 455575573161.

161375575554 is a `hidden beast` number, since 1 + 6 + 1 + 37 + 5 + 57 + 5 + 554 = 666.

161375575554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161375575531) and next prime (161375575577).

It can be written as a sum of positive squares in 2 ways, for example, as 138627394929 + 22748180625 = 372327^2 + 150825^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 161375575554.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121152169 + ... + 121153500.

Almost surely, 2^161375575554 is an apocalyptic number.

161375575554 is an abundant number, since it is smaller than the sum of its proper divisors (197721427386).

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

161375575554 is a wasteful number, since it uses less digits than its factorization.

161375575554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242305714 (or 242305711 counting only the distinct ones).

The product of its digits is 11025000, while the sum is 54.

The spelling of 161375575554 in words is "one hundred sixty-one billion, three hundred seventy-five million, five hundred seventy-five thousand, five hundred fifty-four".