161435644616 has 32 divisors (see below), whose sum is σ = 305134279680. Its totient is φ = 80066750400.

The previous prime is 161435644607. The next prime is 161435644673. The reversal of 161435644616 is 616446534161.

161435644616 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161435644616² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

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, 6664046 + ... + 6688226.

It is an arithmetic number, because the mean of its divisors is an integer number (9535446240).

Almost surely, 2^161435644616 is an apocalyptic number.

It is an amenable number.

161435644616 is a deficient number, since it is larger than the sum of its proper divisors (143698635064).

161435644616 is a wasteful number, since it uses less digits than its factorization.

161435644616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30885 (or 30881 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 47.

The spelling of 161435644616 in words is "one hundred sixty-one billion, four hundred thirty-five million, six hundred forty-four thousand, six hundred sixteen".