185640186012 has 24 divisors (see below), whose sum is σ = 433167501312. Its totient is φ = 61879052400.

The previous prime is 185640185923. The next prime is 185640186013. The reversal of 185640186012 is 210681046581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185640186013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184187 + ... + 1331757.

It is an arithmetic number, because the mean of its divisors is an integer number (18048645888).

Almost surely, 2^185640186012 is an apocalyptic number.

185640186012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

185640186012 is an abundant number, since it is smaller than the sum of its proper divisors (247527315300).

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

185640186012 is a wasteful number, since it uses less digits than its factorization.

185640186012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252409 (or 252407 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 185640186012 in words is "one hundred eighty-five billion, six hundred forty million, one hundred eighty-six thousand, twelve".