11777629878 has 80 divisors (see below), whose sum is σ = 30237830304. Its totient is φ = 3356432640.

The previous prime is 11777629859. The next prime is 11777629879. The reversal of 11777629878 is 87892677711.

11777629878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11777629879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 437118 + ... + 463278.

Almost surely, 2^11777629878 is an apocalyptic number.

11777629878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11777629878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15118915152).

11777629878 is an abundant number, since it is smaller than the sum of its proper divisors (18460200426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11777629878 is a wasteful number, since it uses less digits than its factorization.

11777629878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26579 (or 26570 counting only the distinct ones).

The product of its digits is 16595712, while the sum is 63.

The spelling of 11777629878 in words is "eleven billion, seven hundred seventy-seven million, six hundred twenty-nine thousand, eight hundred seventy-eight".