2444640157 has 2 divisors, whose sum is σ = 2444640158. Its totient is φ = 2444640156.

The previous prime is 2444640151. The next prime is 2444640167. The reversal of 2444640157 is 7510464442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1643410521 + 801229636 = 40539^2 + 28306^2 .

It is a cyclic number.

It is not a de Polignac number, because 2444640157 - 2¹¹ = 2444638109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2444640151) 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 as a sum of consecutive naturals, namely, 1222320078 + 1222320079.

It is an arithmetic number, because the mean of its divisors is an integer number (1222320079).

Almost surely, 2^2444640157 is an apocalyptic number.

It is an amenable number.

2444640157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2444640157 is an equidigital number, since it uses as much as digits as its factorization.

2444640157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 37.

The square root of 2444640157 is about 49443.3024483600. The cubic root of 2444640157 is about 1347.1159568879.

The spelling of 2444640157 in words is "two billion, four hundred forty-four million, six hundred forty thousand, one hundred fifty-seven".