25073315881 has 2 divisors, whose sum is σ = 25073315882. Its totient is φ = 25073315880.

The previous prime is 25073315837. The next prime is 25073315909. The reversal of 25073315881 is 18851337052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22010689600 + 3062626281 = 148360^2 + 55341^2 .

It is a cyclic number.

It is not a de Polignac number, because 25073315881 - 2¹⁵ = 25073283113 is a prime.

It is a super-2 number, since 2×25073315881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25073315831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12536657940 + 12536657941.

It is an arithmetic number, because the mean of its divisors is an integer number (12536657941).

Almost surely, 2^25073315881 is an apocalyptic number.

It is an amenable number.

25073315881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25073315881 is an equidigital number, since it uses as much as digits as its factorization.

25073315881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 25073315881 in words is "twenty-five billion, seventy-three million, three hundred fifteen thousand, eight hundred eighty-one".