744568861 has 4 divisors (see below), whose sum is σ = 744871932. Its totient is φ = 744265792.

The previous prime is 744568859. The next prime is 744568901. The reversal of 744568861 is 168865447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168865447 = 37 ⋅4563931.

It can be written as a sum of positive squares in 2 ways, for example, as 619263225 + 125305636 = 24885^2 + 11194^2 .

It is a cyclic number.

It is not a de Polignac number, because 744568861 - 2¹ = 744568859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744568801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147820 + ... + 152773.

It is an arithmetic number, because the mean of its divisors is an integer number (186217983).

Almost surely, 2^744568861 is an apocalyptic number.

It is an amenable number.

744568861 is a deficient number, since it is larger than the sum of its proper divisors (303071).

744568861 is a wasteful number, since it uses less digits than its factorization.

744568861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303070.

The product of its digits is 1290240, while the sum is 49.

The square root of 744568861 is about 27286.7891295403. The cubic root of 744568861 is about 906.3618623963.

The spelling of 744568861 in words is "seven hundred forty-four million, five hundred sixty-eight thousand, eight hundred sixty-one".