16426780695560 has 64 divisors (see below), whose sum is σ = 38376885510000. Its totient is φ = 6320551724032.

The previous prime is 16426780695547. The next prime is 16426780695581. The reversal of 16426780695560 is 6559608762461.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4954212349636 + 11472568345924 = 2225806^2 + 3387118^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26009555 + ... + 26633634.

Almost surely, 2^{16426780695560} is an apocalyptic number.

16426780695560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16426780695560 is an abundant number, since it is smaller than the sum of its proper divisors (21950104814440).

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

16426780695560 is a wasteful number, since it uses less digits than its factorization.

16426780695560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52643498 (or 52643494 counting only the distinct ones).

The product of its (nonzero) digits is 130636800, while the sum is 65.

The spelling of 16426780695560 in words is "sixteen trillion, four hundred twenty-six billion, seven hundred eighty million, six hundred ninety-five thousand, five hundred sixty".