185474745216 has 192 divisors, whose sum is σ = 552986737200. Its totient is φ = 61201152000.

The previous prime is 185474745179. The next prime is 185474745229. The reversal of 185474745216 is 612547474581.

It is a happy number.

185474745216 is a `hidden beast` number, since 1 + 8 + 5 + 47 + 4 + 74 + 521 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×185474745216² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35252026 + ... + 35257286.

Almost surely, 2^185474745216 is an apocalyptic number.

185474745216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 185474745216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276493368600).

185474745216 is an abundant number, since it is smaller than the sum of its proper divisors (367511991984).

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

185474745216 is an equidigital number, since it uses as much as digits as its factorization.

185474745216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5486 (or 5367 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 54.

The spelling of 185474745216 in words is "one hundred eighty-five billion, four hundred seventy-four million, seven hundred forty-five thousand, two hundred sixteen".