16499786580 has 216 divisors, whose sum is σ = 54532767744. Its totient is φ = 4033411200.

The previous prime is 16499786573. The next prime is 16499786617. The reversal of 16499786580 is 8568799461.

16499786580 is a `hidden beast` number, since 1 + 6 + 49 + 9 + 7 + 8 + 6 + 580 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2010285 + ... + 2018475.

Almost surely, 2^16499786580 is an apocalyptic number.

16499786580 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 16499786580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27266383872).

16499786580 is an abundant number, since it is smaller than the sum of its proper divisors (38032981164).

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

16499786580 is a wasteful number, since it uses less digits than its factorization.

16499786580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8275 (or 8251 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 16499786580 in words is "sixteen billion, four hundred ninety-nine million, seven hundred eighty-six thousand, five hundred eighty".