11771727640 has 32 divisors (see below), whose sum is σ = 26506925280. Its totient is φ = 4705039872.

The previous prime is 11771727631. The next prime is 11771727689. The reversal of 11771727640 is 4672717711.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61572 + ... + 165331.

It is an arithmetic number, because the mean of its divisors is an integer number (828341415).

Almost surely, 2^11771727640 is an apocalyptic number.

11771727640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11771727640 is an abundant number, since it is smaller than the sum of its proper divisors (14735197640).

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

11771727640 is a wasteful number, since it uses less digits than its factorization.

11771727640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228211 (or 228207 counting only the distinct ones).

The product of its (nonzero) digits is 115248, while the sum is 43.

The spelling of 11771727640 in words is "eleven billion, seven hundred seventy-one million, seven hundred twenty-seven thousand, six hundred forty".