16550635520 has 192 divisors, whose sum is σ = 42091358400. Its totient is φ = 6228541440.

The previous prime is 16550635489. The next prime is 16550635523. The reversal of 16550635520 is 2553605561.

It is a super-2 number, since 2×16550635520² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (16550635523) 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, 50001755 + ... + 50002085.

It is an arithmetic number, because the mean of its divisors is an integer number (219225825).

Almost surely, 2^16550635520 is an apocalyptic number.

16550635520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16550635520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21045679200).

16550635520 is an abundant number, since it is smaller than the sum of its proper divisors (25540722880).

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

16550635520 is a wasteful number, since it uses less digits than its factorization.

16550635520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 38.

The spelling of 16550635520 in words is "sixteen billion, five hundred fifty million, six hundred thirty-five thousand, five hundred twenty".