15378246979 has 2 divisors, whose sum is σ = 15378246980. Its totient is φ = 15378246978.

The previous prime is 15378246901. The next prime is 15378246997. The reversal of 15378246979 is 97964287351.

Together with next prime (15378246997) 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 15378246979 - 2¹³ = 15378238787 is a prime.

It is not a weakly prime, because it can be changed into another prime (15378246479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7689123489 + 7689123490.

It is an arithmetic number, because the mean of its divisors is an integer number (7689123490).

Almost surely, 2^15378246979 is an apocalyptic number.

15378246979 is a deficient number, since it is larger than the sum of its proper divisors (1).

15378246979 is an equidigital number, since it uses as much as digits as its factorization.

15378246979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 61.

The spelling of 15378246979 in words is "fifteen billion, three hundred seventy-eight million, two hundred forty-six thousand, nine hundred seventy-nine".