25345402477 has 2 divisors, whose sum is σ = 25345402478. Its totient is φ = 25345402476.

The previous prime is 25345402387. The next prime is 25345402549. The reversal of 25345402477 is 77420454352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23816514276 + 1528888201 = 154326^2 + 39101^2 .

It is a cyclic number.

It is not a de Polignac number, because 25345402477 - 2¹⁹ = 25344878189 is a prime.

It is a super-2 number, since 2×25345402477² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25345403477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12672701238 + 12672701239.

It is an arithmetic number, because the mean of its divisors is an integer number (12672701239).

Almost surely, 2^25345402477 is an apocalyptic number.

It is an amenable number.

25345402477 is a deficient number, since it is larger than the sum of its proper divisors (1).

25345402477 is an equidigital number, since it uses as much as digits as its factorization.

25345402477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 940800, while the sum is 43.

The spelling of 25345402477 in words is "twenty-five billion, three hundred forty-five million, four hundred two thousand, four hundred seventy-seven".