11771777660 has 24 divisors (see below), whose sum is σ = 25795548576. Its totient is φ = 4503984320.

The previous prime is 11771777657. The next prime is 11771777671. The reversal of 11771777660 is 6677717711.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11771777599 and 11771777608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12794951 + ... + 12795870.

It is an arithmetic number, because the mean of its divisors is an integer number (1074814524).

Almost surely, 2^11771777660 is an apocalyptic number.

11771777660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11771777660 is an abundant number, since it is smaller than the sum of its proper divisors (14023770916).

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

11771777660 is a wasteful number, since it uses less digits than its factorization.

11771777660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25590853 (or 25590851 counting only the distinct ones).

The product of its (nonzero) digits is 605052, while the sum is 50.

The spelling of 11771777660 in words is "eleven billion, seven hundred seventy-one million, seven hundred seventy-seven thousand, six hundred sixty".