2261340431623 has 48 divisors (see below), whose sum is σ = 2960239988160. Its totient is φ = 1708979779584.

The previous prime is 2261340431621. The next prime is 2261340431671. The reversal of 2261340431623 is 3261340431622.

It is not a de Polignac number, because 2261340431623 - 2¹ = 2261340431621 is a prime.

It is a super-2 number, since 2×2261340431623² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261340431621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10278711 + ... + 10496407.

It is an arithmetic number, because the mean of its divisors is an integer number (61671666420).

Almost surely, 2^{2261340431623} is an apocalyptic number.

2261340431623 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2261340431623 is a deficient number, since it is larger than the sum of its proper divisors (698899556537).

2261340431623 is a wasteful number, since it uses less digits than its factorization.

2261340431623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218456 (or 218449 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 37.

Subtracting 2261340431623 from its reverse (3261340431622), we obtain a palindrome (999999999999).

The spelling of 2261340431623 in words is "two trillion, two hundred sixty-one billion, three hundred forty million, four hundred thirty-one thousand, six hundred twenty-three".