1255516415323 has 4 divisors (see below), whose sum is σ = 1255519378168. Its totient is φ = 1255513452480.

The previous prime is 1255516415299. The next prime is 1255516415347. The reversal of 1255516415323 is 3235146155521.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1255516415299) and next prime (1255516415347).

It is a cyclic number.

It is not a de Polignac number, because 1255516415323 - 2⁵ = 1255516415291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1255516415323.

It is not an unprimeable number, because it can be changed into a prime (1255516415423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712893 + ... + 1737598.

It is an arithmetic number, because the mean of its divisors is an integer number (313879844542).

Almost surely, 2^{1255516415323} is an apocalyptic number.

1255516415323 is a deficient number, since it is larger than the sum of its proper divisors (2962845).

1255516415323 is an equidigital number, since it uses as much as digits as its factorization.

1255516415323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962844.

The product of its digits is 540000, while the sum is 43.

The spelling of 1255516415323 in words is "one trillion, two hundred fifty-five billion, five hundred sixteen million, four hundred fifteen thousand, three hundred twenty-three".