11291856660 has 72 divisors (see below), whose sum is σ = 39145107456. Its totient is φ = 2580995520.

The previous prime is 11291856629. The next prime is 11291856673. The reversal of 11291856660 is 6665819211.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 4479636 + ... + 4482155.

It is an arithmetic number, because the mean of its divisors is an integer number (543682048).

Almost surely, 2^11291856660 is an apocalyptic number.

11291856660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11291856660 is an abundant number, since it is smaller than the sum of its proper divisors (27853250796).

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

11291856660 is a wasteful number, since it uses less digits than its factorization.

11291856660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8961813 (or 8961808 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 11291856660 in words is "eleven billion, two hundred ninety-one million, eight hundred fifty-six thousand, six hundred sixty".