15616421406599 has 8 divisors (see below), whose sum is σ = 16878398258400. Its totient is φ = 14363117935776.

The previous prime is 15616421406569. The next prime is 15616421406709. The reversal of 15616421406599 is 99560412461651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15616421406599 - 2²⁰ = 15616420358023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15616421406529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2168341499 + ... + 2168348700.

It is an arithmetic number, because the mean of its divisors is an integer number (2109799782300).

Almost surely, 2^{15616421406599} is an apocalyptic number.

15616421406599 is a deficient number, since it is larger than the sum of its proper divisors (1261976851801).

15616421406599 is a wasteful number, since it uses less digits than its factorization.

15616421406599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4336690489.

The product of its (nonzero) digits is 13996800, while the sum is 59.

The spelling of 15616421406599 in words is "fifteen trillion, six hundred sixteen billion, four hundred twenty-one million, four hundred six thousand, five hundred ninety-nine".