2780252805551 has 8 divisors (see below), whose sum is σ = 3151703585520. Its totient is φ = 2431314194112.

The previous prime is 2780252805521. The next prime is 2780252805587. The reversal of 2780252805551 is 1555082520872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2780252805551 - 2⁶ = 2780252805487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2780252805551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780252805511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5628041870 + ... + 5628042363.

It is an arithmetic number, because the mean of its divisors is an integer number (393962948190).

Almost surely, 2^{2780252805551} is an apocalyptic number.

2780252805551 is a deficient number, since it is larger than the sum of its proper divisors (371450779969).

2780252805551 is a wasteful number, since it uses less digits than its factorization.

2780252805551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11256084265.

The product of its (nonzero) digits is 2240000, while the sum is 50.

The spelling of 2780252805551 in words is "two trillion, seven hundred eighty billion, two hundred fifty-two million, eight hundred five thousand, five hundred fifty-one".