2651515277765 has 4 divisors (see below), whose sum is σ = 3181818333324. Its totient is φ = 2121212222208.

The previous prime is 2651515277713. The next prime is 2651515277773. The reversal of 2651515277765 is 5677725151562.

It is a happy number.

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 715849674241 + 1935665603524 = 846079^2 + 1391282^2 .

It is a cyclic number.

It is not a de Polignac number, because 2651515277765 - 2¹⁰ = 2651515276741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265151527772 + ... + 265151527781.

It is an arithmetic number, because the mean of its divisors is an integer number (795454583331).

Almost surely, 2^{2651515277765} is an apocalyptic number.

It is an amenable number.

2651515277765 is a deficient number, since it is larger than the sum of its proper divisors (530303055559).

2651515277765 is an equidigital number, since it uses as much as digits as its factorization.

2651515277765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530303055558.

The product of its digits is 30870000, while the sum is 59.

The spelling of 2651515277765 in words is "two trillion, six hundred fifty-one billion, five hundred fifteen million, two hundred seventy-seven thousand, seven hundred sixty-five".