185855700645 has 24 divisors (see below), whose sum is σ = 322177725792. Its totient is φ = 99114472800.

The previous prime is 185855700643. The next prime is 185855700661. The reversal of 185855700645 is 546007558581.

185855700645 is a `hidden beast` number, since 1 + 8 + 5 + 8 + 5 + 570 + 0 + 64 + 5 = 666.

It is not a de Polignac number, because 185855700645 - 2¹ = 185855700643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 185855700591 and 185855700600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185855700643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 366190 + ... + 711200.

It is an arithmetic number, because the mean of its divisors is an integer number (13424071908).

Almost surely, 2^185855700645 is an apocalyptic number.

185855700645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

185855700645 is a deficient number, since it is larger than the sum of its proper divisors (136322025147).

185855700645 is a wasteful number, since it uses less digits than its factorization.

185855700645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356993 (or 356990 counting only the distinct ones).

The product of its (nonzero) digits is 6720000, while the sum is 54.

The spelling of 185855700645 in words is "one hundred eighty-five billion, eight hundred fifty-five million, seven hundred thousand, six hundred forty-five".