2520657457 has 2 divisors, whose sum is σ = 2520657458. Its totient is φ = 2520657456.

The previous prime is 2520657437. The next prime is 2520657479. The reversal of 2520657457 is 7547560252.

2520657457 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., 1677393936 + 843263521 = 40956^2 + 29039^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520657457 - 2¹¹ = 2520655409 is a prime.

It is not a weakly prime, because it can be changed into another prime (2520657437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260328728 + 1260328729.

It is an arithmetic number, because the mean of its divisors is an integer number (1260328729).

Almost surely, 2^2520657457 is an apocalyptic number.

It is an amenable number.

2520657457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520657457 is an equidigital number, since it uses as much as digits as its factorization.

2520657457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588000, while the sum is 43.

The square root of 2520657457 is about 50206.1495934512. The cubic root of 2520657457 is about 1360.9367567625.

The spelling of 2520657457 in words is "two billion, five hundred twenty million, six hundred fifty-seven thousand, four hundred fifty-seven".