16280399690 has 16 divisors (see below), whose sum is σ = 31028526792. Its totient is φ = 6129091584.

The previous prime is 16280399687. The next prime is 16280399719. The reversal of 16280399690 is 9699308261.

It can be written as a sum of positive squares in 4 ways, for example, as 16228976449 + 51423241 = 127393^2 + 7171^2 .

It is a super-2 number, since 2×16280399690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47883359 + ... + 47883698.

Almost surely, 2^16280399690 is an apocalyptic number.

16280399690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16280399690 is a deficient number, since it is larger than the sum of its proper divisors (14748127102).

16280399690 is a wasteful number, since it uses less digits than its factorization.

16280399690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95767081.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The spelling of 16280399690 in words is "sixteen billion, two hundred eighty million, three hundred ninety-nine thousand, six hundred ninety".