11638578767 has 2 divisors, whose sum is σ = 11638578768. Its totient is φ = 11638578766.

The previous prime is 11638578691. The next prime is 11638578779. The reversal of 11638578767 is 76787583611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11638578767 - 2¹² = 11638574671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11638578167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819289383 + 5819289384.

It is an arithmetic number, because the mean of its divisors is an integer number (5819289384).

Almost surely, 2^11638578767 is an apocalyptic number.

11638578767 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638578767 is an equidigital number, since it uses as much as digits as its factorization.

11638578767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11854080, while the sum is 59.

The spelling of 11638578767 in words is "eleven billion, six hundred thirty-eight million, five hundred seventy-eight thousand, seven hundred sixty-seven".