161583911274 has 16 divisors (see below), whose sum is σ = 325712452608. Its totient is φ = 53437198752.

The previous prime is 161583911263. The next prime is 161583911309. The reversal of 161583911274 is 472119385161.

It is a super-2 number, since 2×161583911274² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106025427 + ... + 106026950.

It is an arithmetic number, because the mean of its divisors is an integer number (20357028288).

Almost surely, 2^161583911274 is an apocalyptic number.

161583911274 is an abundant number, since it is smaller than the sum of its proper divisors (164128541334).

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

161583911274 is a wasteful number, since it uses less digits than its factorization.

161583911274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212052509.

The product of its digits is 362880, while the sum is 48.

The spelling of 161583911274 in words is "one hundred sixty-one billion, five hundred eighty-three million, nine hundred eleven thousand, two hundred seventy-four".