185478086840 has 32 divisors (see below), whose sum is σ = 427030948080. Its totient is φ = 72465856512.

The previous prime is 185478086699. The next prime is 185478086869. The reversal of 185478086840 is 48680874581.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 185478086840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53916329 + ... + 53919768.

Almost surely, 2^185478086840 is an apocalyptic number.

185478086840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

185478086840 is an abundant number, since it is smaller than the sum of its proper divisors (241552861240).

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

185478086840 is a wasteful number, since it uses less digits than its factorization.

185478086840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107836151 (or 107836147 counting only the distinct ones).

The product of its (nonzero) digits is 13762560, while the sum is 59.

The spelling of 185478086840 in words is "one hundred eighty-five billion, four hundred seventy-eight million, eighty-six thousand, eight hundred forty".