18185127640 has 32 divisors (see below), whose sum is σ = 40930362000. Its totient is φ = 7271593344.

The previous prime is 18185127619. The next prime is 18185127673. The reversal of 18185127640 is 4672158181.

It is a super-3 number, since 3×18185127640³ (a number of 32 digits) contains 333 as substring.

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, 45466 + ... + 196054.

Almost surely, 2^18185127640 is an apocalyptic number.

18185127640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18185127640 is an abundant number, since it is smaller than the sum of its proper divisors (22745234360).

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

18185127640 is a wasteful number, since it uses less digits than its factorization.

18185127640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153619 (or 153615 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The spelling of 18185127640 in words is "eighteen billion, one hundred eighty-five million, one hundred twenty-seven thousand, six hundred forty".