16415999999 has 4 divisors (see below), whose sum is σ = 18761142864. Its totient is φ = 14070857136.

The previous prime is 16415999993. The next prime is 16416000017. The reversal of 16415999999 is 99999951461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-16415999999 is a prime.

It is a Duffinian number.

16415999999 is a modest number, since divided by 999999 gives 16415 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16415999993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172571422 + ... + 1172571435.

It is an arithmetic number, because the mean of its divisors is an integer number (4690285716).

Almost surely, 2^16415999999 is an apocalyptic number.

16415999999 is a deficient number, since it is larger than the sum of its proper divisors (2345142865).

16415999999 is an equidigital number, since it uses as much as digits as its factorization.

16415999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345142864.

The product of its digits is 63772920, while the sum is 71.

The spelling of 16415999999 in words is "sixteen billion, four hundred fifteen million, nine hundred ninety-nine thousand, nine hundred ninety-nine".