11315978567 has 2 divisors, whose sum is σ = 11315978568. Its totient is φ = 11315978566.

The previous prime is 11315978519. The next prime is 11315978591. The reversal of 11315978567 is 76587951311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11315978567 - 2²⁰ = 11314929991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11315978767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5657989283 + 5657989284.

It is an arithmetic number, because the mean of its divisors is an integer number (5657989284).

Almost surely, 2^11315978567 is an apocalyptic number.

11315978567 is a deficient number, since it is larger than the sum of its proper divisors (1).

11315978567 is an equidigital number, since it uses as much as digits as its factorization.

11315978567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1587600, while the sum is 53.

The spelling of 11315978567 in words is "eleven billion, three hundred fifteen million, nine hundred seventy-eight thousand, five hundred sixty-seven".