161955837027 has 12 divisors (see below), whose sum is σ = 233950489864. Its totient is φ = 107963966880.

The previous prime is 161955837023. The next prime is 161955837049. The reversal of 161955837027 is 720738559161.

161955837027 is a `hidden beast` number, since 1 + 6 + 19 + 558 + 3 + 70 + 2 + 7 = 666.

It is not a de Polignac number, because 161955837027 - 2² = 161955837023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161955837023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 391249 + ... + 690642.

Almost surely, 2^161955837027 is an apocalyptic number.

161955837027 is a deficient number, since it is larger than the sum of its proper divisors (71994652837).

161955837027 is a wasteful number, since it uses less digits than its factorization.

161955837027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098530 (or 1098527 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The spelling of 161955837027 in words is "one hundred sixty-one billion, nine hundred fifty-five million, eight hundred thirty-seven thousand, twenty-seven".