2551763442493 has 4 divisors (see below), whose sum is σ = 2553097351068. Its totient is φ = 2550429533920.

The previous prime is 2551763442469. The next prime is 2551763442497. The reversal of 2551763442493 is 3942443671552.

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 2058085767609 + 493677674884 = 1434603^2 + 702622^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551763442493 - 2²⁵ = 2551729888061 is a prime.

It is a super-2 number, since 2×2551763442493² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551763442497) 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, 666951418 + ... + 666955243.

It is an arithmetic number, because the mean of its divisors is an integer number (638274337767).

Almost surely, 2^{2551763442493} is an apocalyptic number.

It is an amenable number.

2551763442493 is a deficient number, since it is larger than the sum of its proper divisors (1333908575).

2551763442493 is a wasteful number, since it uses less digits than its factorization.

2551763442493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333908574.

The product of its digits is 21772800, while the sum is 55.

The spelling of 2551763442493 in words is "two trillion, five hundred fifty-one billion, seven hundred sixty-three million, four hundred forty-two thousand, four hundred ninety-three".