11778687660999 has 8 divisors (see below), whose sum is σ = 17948476435840. Its totient is φ = 6730678663416.

The previous prime is 11778687660959. The next prime is 11778687661001. The reversal of 11778687660999 is 99906678687711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11778687660999 - 2²³ = 11778679272391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11778687660959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280444944289 + ... + 280444944330.

It is an arithmetic number, because the mean of its divisors is an integer number (2243559554480).

Almost surely, 2^{11778687660999} is an apocalyptic number.

11778687660999 is a deficient number, since it is larger than the sum of its proper divisors (6169788774841).

11778687660999 is an equidigital number, since it uses as much as digits as its factorization.

11778687660999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560889888629.

The product of its (nonzero) digits is 3456649728, while the sum is 84.

The spelling of 11778687660999 in words is "eleven trillion, seven hundred seventy-eight billion, six hundred eighty-seven million, six hundred sixty thousand, nine hundred ninety-nine".