18356278079 has 2 divisors, whose sum is σ = 18356278080. Its totient is φ = 18356278078.

The previous prime is 18356278007. The next prime is 18356278097. The reversal of 18356278079 is 97087265381.

Together with next prime (18356278097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18356278079 - 2¹² = 18356273983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18356278379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9178139039 + 9178139040.

It is an arithmetic number, because the mean of its divisors is an integer number (9178139040).

Almost surely, 2^18356278079 is an apocalyptic number.

18356278079 is a deficient number, since it is larger than the sum of its proper divisors (1).

18356278079 is an equidigital number, since it uses as much as digits as its factorization.

18356278079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 18356278079 in words is "eighteen billion, three hundred fifty-six million, two hundred seventy-eight thousand, seventy-nine".