161742186746 has 24 divisors (see below), whose sum is σ = 282278498976. Its totient is φ = 69304599000.

The previous prime is 161742186721. The next prime is 161742186773. The reversal of 161742186746 is 647681247161.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354371 + ... + 670121.

It is an arithmetic number, because the mean of its divisors is an integer number (11761604124).

Almost surely, 2^161742186746 is an apocalyptic number.

161742186746 is a deficient number, since it is larger than the sum of its proper divisors (120536312230).

161742186746 is a wasteful number, since it uses less digits than its factorization.

161742186746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320994 (or 320987 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 53.

The spelling of 161742186746 in words is "one hundred sixty-one billion, seven hundred forty-two million, one hundred eighty-six thousand, seven hundred forty-six".