2541564391 has 2 divisors, whose sum is σ = 2541564392. Its totient is φ = 2541564390.

The previous prime is 2541564349. The next prime is 2541564401. The reversal of 2541564391 is 1934651452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2541564391 - 2²³ = 2533175783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2541544391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270782195 + 1270782196.

It is an arithmetic number, because the mean of its divisors is an integer number (1270782196).

Almost surely, 2^2541564391 is an apocalyptic number.

2541564391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2541564391 is an equidigital number, since it uses as much as digits as its factorization.

2541564391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The square root of 2541564391 is about 50413.9305252031. The cubic root of 2541564391 is about 1364.6890463355.

The spelling of 2541564391 in words is "two billion, five hundred forty-one million, five hundred sixty-four thousand, three hundred ninety-one".