185640002840 has 64 divisors (see below), whose sum is σ = 419871656160. Its totient is φ = 73868497920.

The previous prime is 185640002813. The next prime is 185640002857. The reversal of 185640002840 is 48200046581.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 185640002794 and 185640002803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23940404 + ... + 23948156.

Almost surely, 2^185640002840 is an apocalyptic number.

185640002840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

185640002840 is an abundant number, since it is smaller than the sum of its proper divisors (234231653320).

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

185640002840 is a wasteful number, since it uses less digits than its factorization.

185640002840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10812 (or 10808 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The spelling of 185640002840 in words is "one hundred eighty-five billion, six hundred forty million, two thousand, eight hundred forty".