161646633660 has 48 divisors (see below), whose sum is σ = 453024857376. Its totient is φ = 43066313472.

The previous prime is 161646633623. The next prime is 161646633671. The reversal of 161646633660 is 66336646161.

161646633660 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 2×161646633660² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 1166859 + ... + 1298018.

It is an arithmetic number, because the mean of its divisors is an integer number (9438017862).

Almost surely, 2^161646633660 is an apocalyptic number.

161646633660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161646633660 is an abundant number, since it is smaller than the sum of its proper divisors (291378223716).

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

161646633660 is a wasteful number, since it uses less digits than its factorization.

161646633660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465982 (or 2465980 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 48.

The spelling of 161646633660 in words is "one hundred sixty-one billion, six hundred forty-six million, six hundred thirty-three thousand, six hundred sixty".