25264618537 has 2 divisors, whose sum is σ = 25264618538. Its totient is φ = 25264618536.

The previous prime is 25264618513. The next prime is 25264618559. The reversal of 25264618537 is 73581646252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19606720576 + 5657897961 = 140024^2 + 75219^2 .

It is a cyclic number.

It is not a de Polignac number, because 25264618537 - 2⁷ = 25264618409 is a prime.

It is not a weakly prime, because it can be changed into another prime (25264618597) 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, 12632309268 + 12632309269.

It is an arithmetic number, because the mean of its divisors is an integer number (12632309269).

Almost surely, 2^25264618537 is an apocalyptic number.

It is an amenable number.

25264618537 is a deficient number, since it is larger than the sum of its proper divisors (1).

25264618537 is an equidigital number, since it uses as much as digits as its factorization.

25264618537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 49.

The spelling of 25264618537 in words is "twenty-five billion, two hundred sixty-four million, six hundred eighteen thousand, five hundred thirty-seven".