161191360554 has 64 divisors (see below), whose sum is σ = 371790151680. Its totient is φ = 45637084800.

The previous prime is 161191360511. The next prime is 161191360607. The reversal of 161191360554 is 455063191161.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2562807 + ... + 2624949.

It is an arithmetic number, because the mean of its divisors is an integer number (5809221120).

Almost surely, 2^161191360554 is an apocalyptic number.

161191360554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161191360554 is an abundant number, since it is smaller than the sum of its proper divisors (210598791126).

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

161191360554 is a wasteful number, since it uses less digits than its factorization.

161191360554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62715.

The product of its (nonzero) digits is 97200, while the sum is 42.

The spelling of 161191360554 in words is "one hundred sixty-one billion, one hundred ninety-one million, three hundred sixty thousand, five hundred fifty-four".