11808003780 has 72 divisors (see below), whose sum is σ = 35957120472. Its totient is φ = 3136536576.

The previous prime is 11808003707. The next prime is 11808003793. The reversal of 11808003780 is 8730080811.

It can be written as a sum of positive squares in 4 ways, for example, as 7606630656 + 4201373124 = 87216^2 + 64818^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81367 + ... + 173886.

It is an arithmetic number, because the mean of its divisors is an integer number (499404451).

Almost surely, 2^11808003780 is an apocalyptic number.

11808003780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11808003780 is an abundant number, since it is smaller than the sum of its proper divisors (24149116692).

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

11808003780 is a wasteful number, since it uses less digits than its factorization.

11808003780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255525 (or 255520 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 11808003780 in words is "eleven billion, eight hundred eight million, three thousand, seven hundred eighty".