25020343400557 has 2 divisors, whose sum is σ = 25020343400558. Its totient is φ = 25020343400556.

The previous prime is 25020343400551. The next prime is 25020343400593. The reversal of 25020343400557 is 75500434302052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24578452167556 + 441891233001 = 4957666^2 + 664749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25020343400557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25020343400551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12510171700278 + 12510171700279.

It is an arithmetic number, because the mean of its divisors is an integer number (12510171700279).

Almost surely, 2^{25020343400557} is an apocalyptic number.

It is an amenable number.

25020343400557 is a deficient number, since it is larger than the sum of its proper divisors (1).

25020343400557 is an equidigital number, since it uses as much as digits as its factorization.

25020343400557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504000, while the sum is 40.

The spelling of 25020343400557 in words is "twenty-five trillion, twenty billion, three hundred forty-three million, four hundred thousand, five hundred fifty-seven".