26421107258387 has 2 divisors, whose sum is σ = 26421107258388. Its totient is φ = 26421107258386.

The previous prime is 26421107258347. The next prime is 26421107258417. The reversal of 26421107258387 is 78385270112462.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26421107258387 - 2¹² = 26421107254291 is a prime.

It is not a weakly prime, because it can be changed into another prime (26421107258327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13210553629193 + 13210553629194.

It is an arithmetic number, because the mean of its divisors is an integer number (13210553629194).

Almost surely, 2^{26421107258387} is an apocalyptic number.

26421107258387 is a deficient number, since it is larger than the sum of its proper divisors (1).

26421107258387 is an equidigital number, since it uses as much as digits as its factorization.

26421107258387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 26421107258387 in words is "twenty-six trillion, four hundred twenty-one billion, one hundred seven million, two hundred fifty-eight thousand, three hundred eighty-seven".