161937007738 has 24 divisors (see below), whose sum is σ = 270212158944. Its totient is φ = 72720881640.

The previous prime is 161937007711. The next prime is 161937007783. The reversal of 161937007738 is 837700739161.

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, 4011006 + ... + 4051177.

It is an arithmetic number, because the mean of its divisors is an integer number (11258839956).

Almost surely, 2^161937007738 is an apocalyptic number.

161937007738 is a deficient number, since it is larger than the sum of its proper divisors (108275151206).

161937007738 is a wasteful number, since it uses less digits than its factorization.

161937007738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8062290 (or 8062279 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 52.

The spelling of 161937007738 in words is "one hundred sixty-one billion, nine hundred thirty-seven million, seven thousand, seven hundred thirty-eight".