25545355615567 has 2 divisors, whose sum is σ = 25545355615568. Its totient is φ = 25545355615566.

The previous prime is 25545355615541. The next prime is 25545355615583. The reversal of 25545355615567 is 76551655354552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25545355615567 is a prime.

It is a super-2 number, since 2×25545355615567² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25545355615499 and 25545355615508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25545355615667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12772677807783 + 12772677807784.

It is an arithmetic number, because the mean of its divisors is an integer number (12772677807784).

Almost surely, 2^{25545355615567} is an apocalyptic number.

25545355615567 is a deficient number, since it is larger than the sum of its proper divisors (1).

25545355615567 is an equidigital number, since it uses as much as digits as its factorization.

25545355615567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 472500000, while the sum is 64.

The spelling of 25545355615567 in words is "twenty-five trillion, five hundred forty-five billion, three hundred fifty-five million, six hundred fifteen thousand, five hundred sixty-seven".