11678638280 has 32 divisors (see below), whose sum is σ = 26385990840. Its totient is φ = 4652067840.

The previous prime is 11678638261. The next prime is 11678638289. The reversal of 11678638280 is 8283687611.

It can be written as a sum of positive squares in 4 ways, for example, as 11650611844 + 28026436 = 107938^2 + 5294^2 .

It is not an unprimeable number, because it can be changed into a prime (11678638289) 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, 596099 + ... + 615378.

Almost surely, 2^11678638280 is an apocalyptic number.

11678638280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11678638280 is an abundant number, since it is smaller than the sum of its proper divisors (14707352560).

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

11678638280 is a wasteful number, since it uses less digits than its factorization.

11678638280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211729 (or 1211725 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 11678638280 in words is "eleven billion, six hundred seventy-eight million, six hundred thirty-eight thousand, two hundred eighty".