18416595640 has 32 divisors (see below), whose sum is σ = 41461544880. Its totient is φ = 7362335232.

The previous prime is 18416595541. The next prime is 18416595653. The reversal of 18416595640 is 4659561481.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

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, 64689 + ... + 202528.

Almost surely, 2^18416595640 is an apocalyptic number.

18416595640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18416595640 is an abundant number, since it is smaller than the sum of its proper divisors (23044949240).

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

18416595640 is a wasteful number, since it uses less digits than its factorization.

18416595640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268951 (or 268947 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 18416595640 in words is "eighteen billion, four hundred sixteen million, five hundred ninety-five thousand, six hundred forty".