25544674887157 has 2 divisors, whose sum is σ = 25544674887158. Its totient is φ = 25544674887156.

The previous prime is 25544674887139. The next prime is 25544674887181. The reversal of 25544674887157 is 75178847644552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17462486446596 + 8082188440561 = 4178814^2 + 2842919^2 .

It is a cyclic number.

It is not a de Polignac number, because 25544674887157 - 2⁷ = 25544674887029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25544674887157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25544674887757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12772337443578 + 12772337443579.

It is an arithmetic number, because the mean of its divisors is an integer number (12772337443579).

Almost surely, 2^{25544674887157} is an apocalyptic number.

It is an amenable number.

25544674887157 is a deficient number, since it is larger than the sum of its proper divisors (1).

25544674887157 is an equidigital number, since it uses as much as digits as its factorization.

25544674887157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2107392000, while the sum is 73.

The spelling of 25544674887157 in words is "twenty-five trillion, five hundred forty-four billion, six hundred seventy-four million, eight hundred eighty-seven thousand, one hundred fifty-seven".