161554234672 has 20 divisors (see below), whose sum is σ = 313017811560. Its totient is φ = 80775444608.

The previous prime is 161554234669. The next prime is 161554234717. The reversal of 161554234672 is 276432455161.

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, 1144323 + ... + 1277725.

It is an arithmetic number, because the mean of its divisors is an integer number (15650890578).

Almost surely, 2^161554234672 is an apocalyptic number.

It is an amenable number.

161554234672 is a deficient number, since it is larger than the sum of its proper divisors (151463576888).

161554234672 is a wasteful number, since it uses less digits than its factorization.

161554234672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209100 (or 209094 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 46.

The spelling of 161554234672 in words is "one hundred sixty-one billion, five hundred fifty-four million, two hundred thirty-four thousand, six hundred seventy-two".