161840863560 has 64 divisors (see below), whose sum is σ = 490236439680. Its totient is φ = 42738554880.

The previous prime is 161840863543. The next prime is 161840863577. The reversal of 161840863560 is 65368048161.

It is an interprime number because it is at equal distance from previous prime (161840863543) and next prime (161840863577).

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, 6534601 + ... + 6559320.

It is an arithmetic number, because the mean of its divisors is an integer number (7659944370).

Almost surely, 2^161840863560 is an apocalyptic number.

161840863560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161840863560 is an abundant number, since it is smaller than the sum of its proper divisors (328395576120).

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

161840863560 is a wasteful number, since it uses less digits than its factorization.

161840863560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13094038 (or 13094034 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 161840863560 in words is "one hundred sixty-one billion, eight hundred forty million, eight hundred sixty-three thousand, five hundred sixty".