25424969501 has 2 divisors, whose sum is σ = 25424969502. Its totient is φ = 25424969500.

The previous prime is 25424969443. The next prime is 25424969551. The reversal of 25424969501 is 10596942452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25424621401 + 348100 = 159451^2 + 590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25424969501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25424969551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12712484750 + 12712484751.

It is an arithmetic number, because the mean of its divisors is an integer number (12712484751).

Almost surely, 2^25424969501 is an apocalyptic number.

It is an amenable number.

25424969501 is a deficient number, since it is larger than the sum of its proper divisors (1).

25424969501 is an equidigital number, since it uses as much as digits as its factorization.

25424969501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 25424969501 in words is "twenty-five billion, four hundred twenty-four million, nine hundred sixty-nine thousand, five hundred one".