16320615318 has 72 divisors (see below), whose sum is σ = 42658178472. Its totient is φ = 4663026144.

The previous prime is 16320615313. The next prime is 16320615371. The reversal of 16320615318 is 81351602361.

16320615318 is a `hidden beast` number, since 1 + 6 + 3 + 2 + 0 + 615 + 31 + 8 = 666.

It is a super-2 number, since 2×16320615318² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16320615313) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 318855 + ... + 366482.

It is an arithmetic number, because the mean of its divisors is an integer number (592474701).

Almost surely, 2^16320615318 is an apocalyptic number.

16320615318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16320615318 is an abundant number, since it is smaller than the sum of its proper divisors (26337563154).

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

16320615318 is an equidigital number, since it uses as much as digits as its factorization.

16320615318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685368 (or 685349 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 16320615318 in words is "sixteen billion, three hundred twenty million, six hundred fifteen thousand, three hundred eighteen".