2576638397 has 2 divisors, whose sum is σ = 2576638398. Its totient is φ = 2576638396.

The previous prime is 2576638387. The next prime is 2576638417. The reversal of 2576638397 is 7938366752.

It is a happy number.

2576638397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2198296996 + 378341401 = 46886^2 + 19451^2 .

It is a cyclic number.

It is not a de Polignac number, because 2576638397 - 2⁶ = 2576638333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2576638367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1288319198 + 1288319199.

It is an arithmetic number, because the mean of its divisors is an integer number (1288319199).

Almost surely, 2^2576638397 is an apocalyptic number.

It is an amenable number.

2576638397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2576638397 is an equidigital number, since it uses as much as digits as its factorization.

2576638397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11430720, while the sum is 56.

The square root of 2576638397 is about 50760.5988636856. The cubic root of 2576638397 is about 1370.9380325297.

The spelling of 2576638397 in words is "two billion, five hundred seventy-six million, six hundred thirty-eight thousand, three hundred ninety-seven".