1516253618879 has 4 divisors (see below), whose sum is σ = 1531885099584. Its totient is φ = 1500622138176.

The previous prime is 1516253618791. The next prime is 1516253618923. The reversal of 1516253618879 is 9788163526151.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1516253618879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1516253615879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7815740207 + ... + 7815740400.

It is an arithmetic number, because the mean of its divisors is an integer number (382971274896).

Almost surely, 2^{1516253618879} is an apocalyptic number.

1516253618879 is a deficient number, since it is larger than the sum of its proper divisors (15631480705).

1516253618879 is an equidigital number, since it uses as much as digits as its factorization.

1516253618879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15631480704.

The product of its digits is 21772800, while the sum is 62.

The spelling of 1516253618879 in words is "one trillion, five hundred sixteen billion, two hundred fifty-three million, six hundred eighteen thousand, eight hundred seventy-nine".