11756778736 has 40 divisors (see below), whose sum is σ = 23187097280. Its totient is φ = 5773787136.

The previous prime is 11756778731. The next prime is 11756778769. The reversal of 11756778736 is 63787765711.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11756778731) 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, 219856 + ... + 268048.

It is an arithmetic number, because the mean of its divisors is an integer number (579677432).

Almost surely, 2^11756778736 is an apocalyptic number.

11756778736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11756778736 is a deficient number, since it is larger than the sum of its proper divisors (11430318544).

11756778736 is a wasteful number, since it uses less digits than its factorization.

11756778736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48473 (or 48467 counting only the distinct ones).

The product of its digits is 10372320, while the sum is 58.

The spelling of 11756778736 in words is "eleven billion, seven hundred fifty-six million, seven hundred seventy-eight thousand, seven hundred thirty-six".