161776097696 has 24 divisors (see below), whose sum is σ = 320337724644. Its totient is φ = 80420485120.

The previous prime is 161776097687. The next prime is 161776097699. The reversal of 161776097696 is 696790677161.

It can be written as a sum of positive squares in 2 ways, for example, as 127092250000 + 34683847696 = 356500^2 + 186236^2 .

It is not an unprimeable number, because it can be changed into a prime (161776097699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14605745 + ... + 14616816.

Almost surely, 2^161776097696 is an apocalyptic number.

161776097696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161776097696 is a deficient number, since it is larger than the sum of its proper divisors (158561626948).

161776097696 is a wasteful number, since it uses less digits than its factorization.

161776097696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29222744 (or 29222736 counting only the distinct ones).

The product of its (nonzero) digits is 36006768, while the sum is 65.

The spelling of 161776097696 in words is "one hundred sixty-one billion, seven hundred seventy-six million, ninety-seven thousand, six hundred ninety-six".