25150661819 has 2 divisors, whose sum is σ = 25150661820. Its totient is φ = 25150661818.

The previous prime is 25150661707. The next prime is 25150661881. The reversal of 25150661819 is 91816605152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25150661819 - 2²⁸ = 24882226363 is a prime.

It is a super-2 number, since 2×25150661819² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25150661819.

It is not a weakly prime, because it can be changed into another prime (25150661219) 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, 12575330909 + 12575330910.

It is an arithmetic number, because the mean of its divisors is an integer number (12575330910).

Almost surely, 2^25150661819 is an apocalyptic number.

25150661819 is a deficient number, since it is larger than the sum of its proper divisors (1).

25150661819 is an equidigital number, since it uses as much as digits as its factorization.

25150661819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 25150661819 in words is "twenty-five billion, one hundred fifty million, six hundred sixty-one thousand, eight hundred nineteen".