2561144723 has 8 divisors (see below), whose sum is σ = 2598224400. Its totient is φ = 2524249728.

The previous prime is 2561144693. The next prime is 2561144753. The reversal of 2561144723 is 3274411652.

It is an interprime number because it is at equal distance from previous prime (2561144693) and next prime (2561144753).

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 2561144723 - 2¹⁸ = 2560882579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2561144753) 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 7 ways as a sum of consecutive naturals, for example, 18113 + ... + 73826.

It is an arithmetic number, because the mean of its divisors is an integer number (324778050).

Almost surely, 2^2561144723 is an apocalyptic number.

2561144723 is a deficient number, since it is larger than the sum of its proper divisors (37079677).

2561144723 is an equidigital number, since it uses as much as digits as its factorization.

2561144723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92341.

The product of its digits is 40320, while the sum is 35.

The square root of 2561144723 is about 50607.7535857896. The cubic root of 2561144723 is about 1368.1846278732.

The spelling of 2561144723 in words is "two billion, five hundred sixty-one million, one hundred forty-four thousand, seven hundred twenty-three".