25545355616351 has 2 divisors, whose sum is σ = 25545355616352. Its totient is φ = 25545355616350.

The previous prime is 25545355616317. The next prime is 25545355616381. The reversal of 25545355616351 is 15361655354552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25545355616351 - 2²² = 25545351422047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25545355616381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12772677808175 + 12772677808176.

It is an arithmetic number, because the mean of its divisors is an integer number (12772677808176).

Almost surely, 2^{25545355616351} is an apocalyptic number.

25545355616351 is a deficient number, since it is larger than the sum of its proper divisors (1).

25545355616351 is an equidigital number, since it uses as much as digits as its factorization.

25545355616351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40500000, while the sum is 56.

The spelling of 25545355616351 in words is "twenty-five trillion, five hundred forty-five billion, three hundred fifty-five million, six hundred sixteen thousand, three hundred fifty-one".