25193145577 has 2 divisors, whose sum is σ = 25193145578. Its totient is φ = 25193145576.

The previous prime is 25193145511. The next prime is 25193145667. The reversal of 25193145577 is 77554139152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24013841296 + 1179304281 = 154964^2 + 34341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25193145577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25193145577.

It is not a weakly prime, because it can be changed into another prime (25193145277) 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, 12596572788 + 12596572789.

It is an arithmetic number, because the mean of its divisors is an integer number (12596572789).

Almost surely, 2^25193145577 is an apocalyptic number.

It is an amenable number.

25193145577 is a deficient number, since it is larger than the sum of its proper divisors (1).

25193145577 is an equidigital number, since it uses as much as digits as its factorization.

25193145577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1323000, while the sum is 49.

The spelling of 25193145577 in words is "twenty-five billion, one hundred ninety-three million, one hundred forty-five thousand, five hundred seventy-seven".