25480002777791 has 2 divisors, whose sum is σ = 25480002777792. Its totient is φ = 25480002777790.

The previous prime is 25480002777739. The next prime is 25480002777793. The reversal of 25480002777791 is 19777720008452.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25480002777791 - 2³⁸ = 25205124870847 is a prime.

It is a super-2 number, since 2×25480002777791² (a number of 28 digits) contains 22 as substring.

Together with 25480002777793, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25480002777791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25480002777793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12740001388895 + 12740001388896.

It is an arithmetic number, because the mean of its divisors is an integer number (12740001388896).

Almost surely, 2^{25480002777791} is an apocalyptic number.

25480002777791 is a deficient number, since it is larger than the sum of its proper divisors (1).

25480002777791 is an equidigital number, since it uses as much as digits as its factorization.

25480002777791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13829760, while the sum is 59.

The spelling of 25480002777791 in words is "twenty-five trillion, four hundred eighty billion, two million, seven hundred seventy-seven thousand, seven hundred ninety-one".