16556407536 has 20 divisors (see below), whose sum is σ = 42770719592. Its totient is φ = 5518802496.

The previous prime is 16556407493. The next prime is 16556407573. The reversal of 16556407536 is 63570465561.

It is a super-2 number, since 2×16556407536² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 344925157 = 16556407536 / (1 + 6 + 5 + 5 + 6 + 4 + 0 + 7 + 5 + 3 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172462531 + ... + 172462626.

Almost surely, 2^16556407536 is an apocalyptic number.

16556407536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16556407536 is an abundant number, since it is smaller than the sum of its proper divisors (26214312056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16556407536 is a wasteful number, since it uses less digits than its factorization.

16556407536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344925168 (or 344925162 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 48.

The spelling of 16556407536 in words is "sixteen billion, five hundred fifty-six million, four hundred seven thousand, five hundred thirty-six".