161156550634 has 8 divisors (see below), whose sum is σ = 243000453888. Its totient is φ = 80156399340.

The previous prime is 161156550629. The next prime is 161156550671. The reversal of 161156550634 is 436055651161.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 210937512 + ... + 210938275.

It is an arithmetic number, because the mean of its divisors is an integer number (30375056736).

Almost surely, 2^161156550634 is an apocalyptic number.

161156550634 is a deficient number, since it is larger than the sum of its proper divisors (81843903254).

161156550634 is a wasteful number, since it uses less digits than its factorization.

161156550634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421875980.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 161156550634 in words is "one hundred sixty-one billion, one hundred fifty-six million, five hundred fifty thousand, six hundred thirty-four".