16591139859 has 24 divisors (see below), whose sum is σ = 26620554960. Its totient is φ = 9153729984.

The previous prime is 16591139857. The next prime is 16591139879. The reversal of 16591139859 is 95893119561.

It is not a de Polignac number, because 16591139859 - 2¹ = 16591139857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16591139799 and 16591139808.

It is not an unprimeable number, because it can be changed into a prime (16591139857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1941684 + ... + 1950209.

It is an arithmetic number, because the mean of its divisors is an integer number (1109189790).

Almost surely, 2^16591139859 is an apocalyptic number.

16591139859 is a deficient number, since it is larger than the sum of its proper divisors (10029415101).

16591139859 is a wasteful number, since it uses less digits than its factorization.

16591139859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891939 (or 3891932 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 57.

The spelling of 16591139859 in words is "sixteen billion, five hundred ninety-one million, one hundred thirty-nine thousand, eight hundred fifty-nine".