25406167403 has 2 divisors, whose sum is σ = 25406167404. Its totient is φ = 25406167402.

The previous prime is 25406167387. The next prime is 25406167439. The reversal of 25406167403 is 30476160452.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25406167403 - 2⁴ = 25406167387 is a prime.

It is not a weakly prime, because it can be changed into another prime (25406167603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12703083701 + 12703083702.

It is an arithmetic number, because the mean of its divisors is an integer number (12703083702).

Almost surely, 2^25406167403 is an apocalyptic number.

25406167403 is a deficient number, since it is larger than the sum of its proper divisors (1).

25406167403 is an equidigital number, since it uses as much as digits as its factorization.

25406167403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 25406167403 in words is "twenty-five billion, four hundred six million, one hundred sixty-seven thousand, four hundred three".