25126000621 has 2 divisors, whose sum is σ = 25126000622. Its totient is φ = 25126000620.

The previous prime is 25126000573. The next prime is 25126000651. The reversal of 25126000621 is 12600062152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23020475625 + 2105524996 = 151725^2 + 45886^2 .

It is a cyclic number.

It is not a de Polignac number, because 25126000621 - 2¹³ = 25125992429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25126000651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12563000310 + 12563000311.

It is an arithmetic number, because the mean of its divisors is an integer number (12563000311).

Almost surely, 2^25126000621 is an apocalyptic number.

It is an amenable number.

25126000621 is a deficient number, since it is larger than the sum of its proper divisors (1).

25126000621 is an equidigital number, since it uses as much as digits as its factorization.

25126000621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 25126000621 its reverse (12600062152), we get a palindrome (37726062773).

The spelling of 25126000621 in words is "twenty-five billion, one hundred twenty-six million, six hundred twenty-one", and thus it is an aban number.