11638578793 has 2 divisors, whose sum is σ = 11638578794. Its totient is φ = 11638578792.

The previous prime is 11638578779. The next prime is 11638578799. The reversal of 11638578793 is 39787583611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10529222544 + 1109356249 = 102612^2 + 33307^2 .

It is a cyclic number.

It is not a de Polignac number, because 11638578793 - 2³³ = 3048644201 is a prime.

It is not a weakly prime, because it can be changed into another prime (11638578799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819289396 + 5819289397.

It is an arithmetic number, because the mean of its divisors is an integer number (5819289397).

Almost surely, 2^11638578793 is an apocalyptic number.

It is an amenable number.

11638578793 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638578793 is an equidigital number, since it uses as much as digits as its factorization.

11638578793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 58.

The spelling of 11638578793 in words is "eleven billion, six hundred thirty-eight million, five hundred seventy-eight thousand, seven hundred ninety-three".