15426643979 has 2 divisors, whose sum is σ = 15426643980. Its totient is φ = 15426643978.

The previous prime is 15426643963. The next prime is 15426643993. The reversal of 15426643979 is 97934662451.

It is a strong prime.

It is an emirp because it is prime and its reverse (97934662451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15426643979 - 2⁴ = 15426643963 is a prime.

It is not a weakly prime, because it can be changed into another prime (15426643079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7713321989 + 7713321990.

It is an arithmetic number, because the mean of its divisors is an integer number (7713321990).

Almost surely, 2^15426643979 is an apocalyptic number.

15426643979 is a deficient number, since it is larger than the sum of its proper divisors (1).

15426643979 is an equidigital number, since it uses as much as digits as its factorization.

15426643979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9797760, while the sum is 56.

The spelling of 15426643979 in words is "fifteen billion, four hundred twenty-six million, six hundred forty-three thousand, nine hundred seventy-nine".