26400520403 has 2 divisors, whose sum is σ = 26400520404. Its totient is φ = 26400520402.

The previous prime is 26400520319. The next prime is 26400520409. The reversal of 26400520403 is 30402500462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26400520403 - 2⁸ = 26400520147 is a prime.

It is not a weakly prime, because it can be changed into another prime (26400520409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13200260201 + 13200260202.

It is an arithmetic number, because the mean of its divisors is an integer number (13200260202).

Almost surely, 2^26400520403 is an apocalyptic number.

26400520403 is a deficient number, since it is larger than the sum of its proper divisors (1).

26400520403 is an equidigital number, since it uses as much as digits as its factorization.

26400520403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 26.

The spelling of 26400520403 in words is "twenty-six billion, four hundred million, five hundred twenty thousand, four hundred three".