16265798660 has 24 divisors (see below), whose sum is σ = 35081372760. Its totient is φ = 6330472704.

The previous prime is 16265798639. The next prime is 16265798669. The reversal of 16265798660 is 6689756261.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1165812736 + 15099985924 = 34144^2 + 122882^2 .

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16265798596 and 16265798605.

It is not an unprimeable number, because it can be changed into a prime (16265798669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10989665 + ... + 10991144.

It is an arithmetic number, because the mean of its divisors is an integer number (1461723865).

Almost surely, 2^16265798660 is an apocalyptic number.

16265798660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16265798660 is an abundant number, since it is smaller than the sum of its proper divisors (18815574100).

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

16265798660 is a wasteful number, since it uses less digits than its factorization.

16265798660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21980855 (or 21980853 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 16265798660 in words is "sixteen billion, two hundred sixty-five million, seven hundred ninety-eight thousand, six hundred sixty".