25672074581 has 2 divisors, whose sum is σ = 25672074582. Its totient is φ = 25672074580.

The previous prime is 25672074517. The next prime is 25672074587. The reversal of 25672074581 is 18547027652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25586881681 + 85192900 = 159959^2 + 9230^2 .

It is a cyclic number.

It is not a de Polignac number, because 25672074581 - 2⁶ = 25672074517 is a prime.

It is a super-2 number, since 2×25672074581² (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 (25672074587) 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, 12836037290 + 12836037291.

It is an arithmetic number, because the mean of its divisors is an integer number (12836037291).

Almost surely, 2^25672074581 is an apocalyptic number.

It is an amenable number.

25672074581 is a deficient number, since it is larger than the sum of its proper divisors (1).

25672074581 is an equidigital number, since it uses as much as digits as its factorization.

25672074581 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 47.

The spelling of 25672074581 in words is "twenty-five billion, six hundred seventy-two million, seventy-four thousand, five hundred eighty-one".