161974041258 has 32 divisors (see below), whose sum is σ = 330101692416. Its totient is φ = 52966001088.

The previous prime is 161974041239. The next prime is 161974041331. The reversal of 161974041258 is 852140479161.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2943816 + ... + 2998332.

It is an arithmetic number, because the mean of its divisors is an integer number (10315677888).

Almost surely, 2^161974041258 is an apocalyptic number.

161974041258 is an abundant number, since it is smaller than the sum of its proper divisors (168127651158).

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

161974041258 is a wasteful number, since it uses less digits than its factorization.

161974041258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63918.

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 161974041258 in words is "one hundred sixty-one billion, nine hundred seventy-four million, forty-one thousand, two hundred fifty-eight".