28161371064 has 32 divisors (see below), whose sum is σ = 70456561920. Its totient is φ = 9380039136.

The previous prime is 28161371047. The next prime is 28161371093. The reversal of 28161371064 is 46017316182.

It is a congruent number.

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, 410274 + ... + 473969.

It is an arithmetic number, because the mean of its divisors is an integer number (2201767560).

Almost surely, 2^28161371064 is an apocalyptic number.

28161371064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28161371064 is an abundant number, since it is smaller than the sum of its proper divisors (42295190856).

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

28161371064 is a wasteful number, since it uses less digits than its factorization.

28161371064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885579 (or 885575 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 28161371064 in words is "twenty-eight billion, one hundred sixty-one million, three hundred seventy-one thousand, sixty-four".