25404746387 has 2 divisors, whose sum is σ = 25404746388. Its totient is φ = 25404746386.

The previous prime is 25404746383. The next prime is 25404746413. The reversal of 25404746387 is 78364740452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25404746387 - 2² = 25404746383 is a prime.

It is a super-2 number, since 2×25404746387² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25404746383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12702373193 + 12702373194.

It is an arithmetic number, because the mean of its divisors is an integer number (12702373194).

Almost surely, 2^25404746387 is an apocalyptic number.

25404746387 is a deficient number, since it is larger than the sum of its proper divisors (1).

25404746387 is an equidigital number, since it uses as much as digits as its factorization.

25404746387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4515840, while the sum is 50.

The spelling of 25404746387 in words is "twenty-five billion, four hundred four million, seven hundred forty-six thousand, three hundred eighty-seven".