1280117615399 has 16 divisors (see below), whose sum is σ = 1487121302016. Its totient is φ = 1079219786400.

The previous prime is 1280117615311. The next prime is 1280117615459. The reversal of 1280117615399 is 9935167110821.

It is not a de Polignac number, because 1280117615399 - 2⁸ = 1280117615143 is a prime.

It is a super-2 number, since 2×1280117615399² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1280117615399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280117615299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2849777 + ... + 3268250.

It is an arithmetic number, because the mean of its divisors is an integer number (92945081376).

Almost surely, 2^{1280117615399} is an apocalyptic number.

1280117615399 is a deficient number, since it is larger than the sum of its proper divisors (207003686617).

1280117615399 is an equidigital number, since it uses as much as digits as its factorization.

1280117615399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6118526.

The product of its (nonzero) digits is 816480, while the sum is 53.

The spelling of 1280117615399 in words is "one trillion, two hundred eighty billion, one hundred seventeen million, six hundred fifteen thousand, three hundred ninety-nine".