11277427720 has 32 divisors (see below), whose sum is σ = 27326076120. Its totient is φ = 4163973120.

The previous prime is 11277427697. The next prime is 11277427727. The reversal of 11277427720 is 2772477211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10375867044 + 901560676 = 101862^2 + 30026^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (11277427727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10843161 + ... + 10844200.

Almost surely, 2^11277427720 is an apocalyptic number.

11277427720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11277427720 is an abundant number, since it is smaller than the sum of its proper divisors (16048648400).

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

11277427720 is a wasteful number, since it uses less digits than its factorization.

11277427720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21687385 (or 21687381 counting only the distinct ones).

The product of its (nonzero) digits is 76832, while the sum is 40.

The spelling of 11277427720 in words is "eleven billion, two hundred seventy-seven million, four hundred twenty-seven thousand, seven hundred twenty".