16512113505 has 32 divisors (see below), whose sum is σ = 26770060800. Its totient is φ = 8689704192.

The previous prime is 16512113503. The next prime is 16512113507. The reversal of 16512113505 is 50531121561.

It is an interprime number because it is at equal distance from previous prime (16512113503) and next prime (16512113507).

It is not a de Polignac number, because 16512113505 - 2¹ = 16512113503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16512113503) 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, 2647731 + ... + 2653959.

It is an arithmetic number, because the mean of its divisors is an integer number (836564400).

Almost surely, 2^16512113505 is an apocalyptic number.

16512113505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16512113505 is a deficient number, since it is larger than the sum of its proper divisors (10257947295).

16512113505 is a wasteful number, since it uses less digits than its factorization.

16512113505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8553.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 16512113505 in words is "sixteen billion, five hundred twelve million, one hundred thirteen thousand, five hundred five".