2542196746865 has 4 divisors (see below), whose sum is σ = 3050636096244. Its totient is φ = 2033757397488.

The previous prime is 2542196746861. The next prime is 2542196746867. The reversal of 2542196746865 is 5686476912452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2013072893584 + 529123853281 = 1418828^2 + 727409^2 .

It is a cyclic number.

It is not a de Polignac number, because 2542196746865 - 2² = 2542196746861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2542196746861) 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, 254219674682 + ... + 254219674691.

It is an arithmetic number, because the mean of its divisors is an integer number (762659024061).

Almost surely, 2^{2542196746865} is an apocalyptic number.

It is an amenable number.

2542196746865 is a deficient number, since it is larger than the sum of its proper divisors (508439349379).

2542196746865 is an equidigital number, since it uses as much as digits as its factorization.

2542196746865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508439349378.

The product of its digits is 174182400, while the sum is 65.

The spelling of 2542196746865 in words is "two trillion, five hundred forty-two billion, one hundred ninety-six million, seven hundred forty-six thousand, eight hundred sixty-five".