16915015449 has 24 divisors (see below), whose sum is σ = 25723969440. Its totient is φ = 10680994368.

The previous prime is 16915015441. The next prime is 16915015451. The reversal of 16915015449 is 94451051961.

16915015449 is a `hidden beast` number, since 1 + 6 + 91 + 501 + 54 + 4 + 9 = 666.

It is not a de Polignac number, because 16915015449 - 2³ = 16915015441 is a prime.

It is a super-2 number, since 2×16915015449² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16915015441) 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, 1454034 + ... + 1465620.

It is an arithmetic number, because the mean of its divisors is an integer number (1071832060).

Almost surely, 2^16915015449 is an apocalyptic number.

16915015449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16915015449 is a deficient number, since it is larger than the sum of its proper divisors (8808953991).

16915015449 is a wasteful number, since it uses less digits than its factorization.

16915015449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20149 (or 20146 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 16915015449 in words is "sixteen billion, nine hundred fifteen million, fifteen thousand, four hundred forty-nine".