25658929801 has 2 divisors, whose sum is σ = 25658929802. Its totient is φ = 25658929800.

The previous prime is 25658929781. The next prime is 25658929811. The reversal of 25658929801 is 10892985652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13386721401 + 12272208400 = 115701^2 + 110780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25658929801 is a prime.

It is not a weakly prime, because it can be changed into another prime (25658929811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12829464900 + 12829464901.

It is an arithmetic number, because the mean of its divisors is an integer number (12829464901).

Almost surely, 2^25658929801 is an apocalyptic number.

It is an amenable number.

25658929801 is a deficient number, since it is larger than the sum of its proper divisors (1).

25658929801 is an equidigital number, since it uses as much as digits as its factorization.

25658929801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3110400, while the sum is 55.

The spelling of 25658929801 in words is "twenty-five billion, six hundred fifty-eight million, nine hundred twenty-nine thousand, eight hundred one".