25878553 has 2 divisors, whose sum is σ = 25878554. Its totient is φ = 25878552.

The previous prime is 25878509. The next prime is 25878581. The reversal of 25878553 is 35587852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25532809 + 345744 = 5053^2 + 588^2 .

It is a cyclic number.

It is not a de Polignac number, because 25878553 - 2¹⁷ = 25747481 is a prime.

It is not a weakly prime, because it can be changed into another prime (25878253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12939276 + 12939277.

It is an arithmetic number, because the mean of its divisors is an integer number (12939277).

Almost surely, 2^25878553 is an apocalyptic number.

It is an amenable number.

25878553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25878553 is an equidigital number, since it uses as much as digits as its factorization.

25878553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336000, while the sum is 43.

The square root of 25878553 is about 5087.0967162027. The cubic root of 25878553 is about 295.7876223406.

The spelling of 25878553 in words is "twenty-five million, eight hundred seventy-eight thousand, five hundred fifty-three".