16553504358 has 32 divisors (see below), whose sum is σ = 37075230720. Its totient is φ = 5474385000.

The previous prime is 16553504351. The next prime is 16553504371. The reversal of 16553504358 is 85340535561.

16553504358 is a `hidden beast` number, since 1 + 6 + 553 + 5 + 0 + 43 + 58 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16553504351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1200018 + ... + 1213733.

It is an arithmetic number, because the mean of its divisors is an integer number (1158600960).

Almost surely, 2^16553504358 is an apocalyptic number.

16553504358 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16553504358 is an abundant number, since it is smaller than the sum of its proper divisors (20521726362).

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

16553504358 is a wasteful number, since it uses less digits than its factorization.

16553504358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413889 (or 2413883 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 16553504358 in words is "sixteen billion, five hundred fifty-three million, five hundred four thousand, three hundred fifty-eight".