25610157109 has 2 divisors, whose sum is σ = 25610157110. Its totient is φ = 25610157108.

The previous prime is 25610157031. The next prime is 25610157119. The reversal of 25610157109 is 90175101652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24886009009 + 724148100 = 157753^2 + 26910^2 .

It is a cyclic number.

It is not a de Polignac number, because 25610157109 - 2¹³ = 25610148917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25610157119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12805078554 + 12805078555.

It is an arithmetic number, because the mean of its divisors is an integer number (12805078555).

Almost surely, 2^25610157109 is an apocalyptic number.

It is an amenable number.

25610157109 is a deficient number, since it is larger than the sum of its proper divisors (1).

25610157109 is an equidigital number, since it uses as much as digits as its factorization.

25610157109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 37.

The spelling of 25610157109 in words is "twenty-five billion, six hundred ten million, one hundred fifty-seven thousand, one hundred nine".