16491073515 has 32 divisors (see below), whose sum is σ = 30160897536. Its totient is φ = 7537328640.

The previous prime is 16491073513. The next prime is 16491073517. The reversal of 16491073515 is 51537019461.

It is an interprime number because it is at equal distance from previous prime (16491073513) and next prime (16491073517).

It is not a de Polignac number, because 16491073515 - 2¹ = 16491073513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16491073513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 690819 + ... + 714291.

It is an arithmetic number, because the mean of its divisors is an integer number (942528048).

Almost surely, 2^16491073515 is an apocalyptic number.

16491073515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16491073515 is a deficient number, since it is larger than the sum of its proper divisors (13669824021).

16491073515 is a wasteful number, since it uses less digits than its factorization.

16491073515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30179.

The product of its (nonzero) digits is 113400, while the sum is 42.

The spelling of 16491073515 in words is "sixteen billion, four hundred ninety-one million, seventy-three thousand, five hundred fifteen".