16631564287 has 12 divisors (see below), whose sum is σ = 19068702480. Its totient is φ = 14449139328.

The previous prime is 16631564267. The next prime is 16631564297. The reversal of 16631564287 is 78246513661.

It is not a de Polignac number, because 16631564287 - 2¹⁵ = 16631531519 is a prime.

It is a super-2 number, since 2×16631564287² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16631564287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16631564227) 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, 2891587 + ... + 2897332.

It is an arithmetic number, because the mean of its divisors is an integer number (1589058540).

Almost surely, 2^16631564287 is an apocalyptic number.

16631564287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

16631564287 is a deficient number, since it is larger than the sum of its proper divisors (2437138193).

16631564287 is a wasteful number, since it uses less digits than its factorization.

16631564287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5788962 (or 5788949 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The spelling of 16631564287 in words is "sixteen billion, six hundred thirty-one million, five hundred sixty-four thousand, two hundred eighty-seven".