25541001646157 has 2 divisors, whose sum is σ = 25541001646158. Its totient is φ = 25541001646156.

The previous prime is 25541001646103. The next prime is 25541001646201. The reversal of 25541001646157 is 75164610014552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14041890057001 + 11499111589156 = 3747251^2 + 3391034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25541001646157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25541001646957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12770500823078 + 12770500823079.

It is an arithmetic number, because the mean of its divisors is an integer number (12770500823079).

Almost surely, 2^{25541001646157} is an apocalyptic number.

It is an amenable number.

25541001646157 is a deficient number, since it is larger than the sum of its proper divisors (1).

25541001646157 is an equidigital number, since it uses as much as digits as its factorization.

25541001646157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 25541001646157 in words is "twenty-five trillion, five hundred forty-one billion, one million, six hundred forty-six thousand, one hundred fifty-seven".