161550545747634 has 12 divisors (see below), whose sum is σ = 350026182453246. Its totient is φ = 53850181915872.

The previous prime is 161550545747543. The next prime is 161550545747663. The reversal of 161550545747634 is 436747545055161.

It is a happy number.

161550545747634 is a `hidden beast` number, since 1 + 6 + 1 + 5 + 5 + 0 + 54 + 574 + 7 + 6 + 3 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 83013108989409 + 78537436758225 = 9111153^2 + 8862135^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4487515159639 + ... + 4487515159674.

Almost surely, 2^{161550545747634} is an apocalyptic number.

161550545747634 is an abundant number, since it is smaller than the sum of its proper divisors (188475636705612).

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

161550545747634 is a wasteful number, since it uses less digits than its factorization.

161550545747634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8975030319321 (or 8975030319318 counting only the distinct ones).

The product of its (nonzero) digits is 211680000, while the sum is 63.

The spelling of 161550545747634 in words is "one hundred sixty-one trillion, five hundred fifty billion, five hundred forty-five million, seven hundred forty-seven thousand, six hundred thirty-four".