25353000781 has 2 divisors, whose sum is σ = 25353000782. Its totient is φ = 25353000780.

The previous prime is 25353000737. The next prime is 25353000787. The reversal of 25353000781 is 18700035352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13719436900 + 11633563881 = 117130^2 + 107859^2 .

It is a cyclic number.

It is not a de Polignac number, because 25353000781 - 2²⁹ = 24816129869 is a prime.

It is a super-2 number, since 2×25353000781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25353000787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12676500390 + 12676500391.

It is an arithmetic number, because the mean of its divisors is an integer number (12676500391).

Almost surely, 2^25353000781 is an apocalyptic number.

It is an amenable number.

25353000781 is a deficient number, since it is larger than the sum of its proper divisors (1).

25353000781 is an equidigital number, since it uses as much as digits as its factorization.

25353000781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 25353000781 in words is "twenty-five billion, three hundred fifty-three million, seven hundred eighty-one", and thus it is an aban number.