161364441860 has 24 divisors (see below), whose sum is σ = 344608810560. Its totient is φ = 63451780064.

The previous prime is 161364441839. The next prime is 161364441991. The reversal of 161364441860 is 68144463161.

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, 68373584 + ... + 68375943.

It is an arithmetic number, because the mean of its divisors is an integer number (14358700440).

Almost surely, 2^161364441860 is an apocalyptic number.

161364441860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161364441860 is an abundant number, since it is smaller than the sum of its proper divisors (183244368700).

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

161364441860 is a wasteful number, since it uses less digits than its factorization.

161364441860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136749595 (or 136749593 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 161364441860 in words is "one hundred sixty-one billion, three hundred sixty-four million, four hundred forty-one thousand, eight hundred sixty".