161523553355 has 16 divisors (see below), whose sum is σ = 203472000000. Its totient is φ = 122930986080.

The previous prime is 161523553327. The next prime is 161523553357. The reversal of 161523553355 is 553355325161.

It is not a de Polignac number, because 161523553355 - 2⁸ = 161523553099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161523553357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8822105 + ... + 8840394.

It is an arithmetic number, because the mean of its divisors is an integer number (12717000000).

Almost surely, 2^161523553355 is an apocalyptic number.

161523553355 is a deficient number, since it is larger than the sum of its proper divisors (41948446645).

161523553355 is a wasteful number, since it uses less digits than its factorization.

161523553355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17662594.

The product of its digits is 1012500, while the sum is 44.

The spelling of 161523553355 in words is "one hundred sixty-one billion, five hundred twenty-three million, five hundred fifty-three thousand, three hundred fifty-five".