16315043616 has 72 divisors (see below), whose sum is σ = 49125090924. Its totient is φ = 5118443520.

The previous prime is 16315043609. The next prime is 16315043639. The reversal of 16315043616 is 61634051361.

16315043616 is a `hidden beast` number, since 1 + 6 + 31 + 5 + 0 + 4 + 3 + 616 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15375008016 + 940035600 = 123996^2 + 30660^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1661265 + ... + 1671056.

Almost surely, 2^16315043616 is an apocalyptic number.

16315043616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16315043616 is an abundant number, since it is smaller than the sum of its proper divisors (32810047308).

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

16315043616 is a wasteful number, since it uses less digits than its factorization.

16315043616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332354 (or 3332343 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 16315043616 its reverse (61634051361), we get a palindrome (77949094977).

The spelling of 16315043616 in words is "sixteen billion, three hundred fifteen million, forty-three thousand, six hundred sixteen".