16510680400 has 60 divisors (see below), whose sum is σ = 40075941052. Its totient is φ = 6536171520.

The previous prime is 16510680391. The next prime is 16510680421. The reversal of 16510680400 is 408601561.

It can be written as a sum of positive squares in 6 ways, for example, as 2102039104 + 14408641296 = 45848^2 + 120036^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173967 + ... + 251566.

Almost surely, 2^16510680400 is an apocalyptic number.

16510680400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16510680400 is an abundant number, since it is smaller than the sum of its proper divisors (23565260652).

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

16510680400 is a wasteful number, since it uses less digits than its factorization.

16510680400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425648 (or 425637 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 16510680400 in words is "sixteen billion, five hundred ten million, six hundred eighty thousand, four hundred".