2253887838781 has 4 divisors (see below), whose sum is σ = 2255745950332. Its totient is φ = 2252029727232.

The previous prime is 2253887838779. The next prime is 2253887838791. The reversal of 2253887838781 is 1878387883522.

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 884039974756 + 1369847864025 = 940234^2 + 1170405^2 .

It is a cyclic number.

It is not a de Polignac number, because 2253887838781 - 2¹ = 2253887838779 is a prime.

It is a super-2 number, since 2×2253887838781² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2253887838781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2253887838731) 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, 929053956 + ... + 929056381.

It is an arithmetic number, because the mean of its divisors is an integer number (563936487583).

Almost surely, 2^{2253887838781} is an apocalyptic number.

It is an amenable number.

2253887838781 is a deficient number, since it is larger than the sum of its proper divisors (1858111551).

2253887838781 is a wasteful number, since it uses less digits than its factorization.

2253887838781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858111550.

The product of its digits is 289013760, while the sum is 70.

The spelling of 2253887838781 in words is "two trillion, two hundred fifty-three billion, eight hundred eighty-seven million, eight hundred thirty-eight thousand, seven hundred eighty-one".