25443311334457 has 2 divisors, whose sum is σ = 25443311334458. Its totient is φ = 25443311334456.

The previous prime is 25443311334433. The next prime is 25443311334503. The reversal of 25443311334457 is 75443311334452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22795697466256 + 2647613868201 = 4774484^2 + 1627149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25443311334457 is a prime.

It is a super-2 number, since 2×25443311334457² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25443311334457.

It is not a weakly prime, because it can be changed into another prime (25443311334157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12721655667228 + 12721655667229.

It is an arithmetic number, because the mean of its divisors is an integer number (12721655667229).

Almost surely, 2^{25443311334457} is an apocalyptic number.

It is an amenable number.

25443311334457 is a deficient number, since it is larger than the sum of its proper divisors (1).

25443311334457 is an equidigital number, since it uses as much as digits as its factorization.

25443311334457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 49.

The spelling of 25443311334457 in words is "twenty-five trillion, four hundred forty-three billion, three hundred eleven million, three hundred thirty-four thousand, four hundred fifty-seven".