16315728489 has 12 divisors (see below), whose sum is σ = 23966607600. Its totient is φ = 10692793464.

The previous prime is 16315728487. The next prime is 16315728551. The reversal of 16315728489 is 98482751361.

16315728489 is a `hidden beast` number, since 1 + 6 + 3 + 157 + 2 + 8 + 489 = 666.

It is not a de Polignac number, because 16315728489 - 2¹ = 16315728487 is a prime.

It is a super-2 number, since 2×16315728489² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16315728487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15362679 + ... + 15363740.

It is an arithmetic number, because the mean of its divisors is an integer number (1997217300).

Almost surely, 2^16315728489 is an apocalyptic number.

It is an amenable number.

16315728489 is a deficient number, since it is larger than the sum of its proper divisors (7650879111).

16315728489 is a wasteful number, since it uses less digits than its factorization.

16315728489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30726484 (or 30726481 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 16315728489 in words is "sixteen billion, three hundred fifteen million, seven hundred twenty-eight thousand, four hundred eighty-nine".