161321471770 has 32 divisors (see below), whose sum is σ = 294076282752. Its totient is φ = 63707946432.

The previous prime is 161321471741. The next prime is 161321471807. The reversal of 161321471770 is 77174123161.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1174099 + ... + 1304281.

It is an arithmetic number, because the mean of its divisors is an integer number (9189883836).

Almost surely, 2^161321471770 is an apocalyptic number.

161321471770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161321471770 is a deficient number, since it is larger than the sum of its proper divisors (132754810982).

161321471770 is a wasteful number, since it uses less digits than its factorization.

161321471770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131766.

The product of its (nonzero) digits is 49392, while the sum is 40.

The spelling of 161321471770 in words is "one hundred sixty-one billion, three hundred twenty-one million, four hundred seventy-one thousand, seven hundred seventy".