185117261020 has 48 divisors (see below), whose sum is σ = 393016095360. Its totient is φ = 73235847744.

The previous prime is 185117260967. The next prime is 185117261023. The reversal of 185117261020 is 20162711581.

185117261020 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 2×185117261020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185117261023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1254787 + ... + 1394533.

It is an arithmetic number, because the mean of its divisors is an integer number (8187835320).

Almost surely, 2^185117261020 is an apocalyptic number.

185117261020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

185117261020 is an abundant number, since it is smaller than the sum of its proper divisors (207898834340).

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

185117261020 is a wasteful number, since it uses less digits than its factorization.

185117261020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140482 (or 140480 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 34.

The spelling of 185117261020 in words is "one hundred eighty-five billion, one hundred seventeen million, two hundred sixty-one thousand, twenty".