50001661164 has 96 divisors (see below), whose sum is σ = 149837829120. Its totient is φ = 12613886208.

The previous prime is 50001661123. The next prime is 50001661189. The reversal of 50001661164 is 46116610005.

50001661164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×50001661164² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 970299 + ... + 1020530.

It is an arithmetic number, because the mean of its divisors is an integer number (1560810720).

Almost surely, 2^50001661164 is an apocalyptic number.

It is an amenable number.

50001661164 is an abundant number, since it is smaller than the sum of its proper divisors (99836167956).

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

50001661164 is a wasteful number, since it uses less digits than its factorization.

50001661164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990879 (or 1990877 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 50001661164 in words is "fifty billion, one million, six hundred sixty-one thousand, one hundred sixty-four".