25311321389 has 2 divisors, whose sum is σ = 25311321390. Its totient is φ = 25311321388.

The previous prime is 25311321377. The next prime is 25311321401. The reversal of 25311321389 is 98312311352.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (25311321377) and next prime (25311321401).

It can be written as a sum of positive squares in only one way, i.e., 21983992900 + 3327328489 = 148270^2 + 57683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25311321389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25311321319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12655660694 + 12655660695.

It is an arithmetic number, because the mean of its divisors is an integer number (12655660695).

Almost surely, 2^25311321389 is an apocalyptic number.

It is an amenable number.

25311321389 is a deficient number, since it is larger than the sum of its proper divisors (1).

25311321389 is an equidigital number, since it uses as much as digits as its factorization.

25311321389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The spelling of 25311321389 in words is "twenty-five billion, three hundred eleven million, three hundred twenty-one thousand, three hundred eighty-nine".