161761776160 has 48 divisors (see below), whose sum is σ = 382219653312. Its totient is φ = 64694982400.

The previous prime is 161761776151. The next prime is 161761776199. The reversal of 161761776160 is 61677167161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1042845 + ... + 1187875.

It is an arithmetic number, because the mean of its divisors is an integer number (7962909444).

Almost surely, 2^161761776160 is an apocalyptic number.

161761776160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161761776160 is an abundant number, since it is smaller than the sum of its proper divisors (220457877152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161761776160 is a wasteful number, since it uses less digits than its factorization.

161761776160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152017 (or 152009 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 49.

The spelling of 161761776160 in words is "one hundred sixty-one billion, seven hundred sixty-one million, seven hundred seventy-six thousand, one hundred sixty".