161572093916 has 12 divisors (see below), whose sum is σ = 283643126088. Its totient is φ = 80531200752.

The previous prime is 161572093901. The next prime is 161572093933. The reversal of 161572093916 is 619390275161.

It is a super-2 number, since 2×161572093916² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63710126 + ... + 63712661.

It is an arithmetic number, because the mean of its divisors is an integer number (23636927174).

Almost surely, 2^161572093916 is an apocalyptic number.

It is an amenable number.

161572093916 is a deficient number, since it is larger than the sum of its proper divisors (122071032172).

161572093916 is a wasteful number, since it uses less digits than its factorization.

161572093916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127423108 (or 127423106 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 161572093916 in words is "one hundred sixty-one billion, five hundred seventy-two million, ninety-three thousand, nine hundred sixteen".