11471565620 has 12 divisors (see below), whose sum is σ = 24090287844. Its totient is φ = 4588626240.

The previous prime is 11471565619. The next prime is 11471565653. The reversal of 11471565620 is 2656517411.

It can be written as a sum of positive squares in 2 ways, for example, as 8331308176 + 3140257444 = 91276^2 + 56038^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286789121 + ... + 286789160.

It is an arithmetic number, because the mean of its divisors is an integer number (2007523987).

Almost surely, 2^11471565620 is an apocalyptic number.

11471565620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11471565620 is an abundant number, since it is smaller than the sum of its proper divisors (12618722224).

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

11471565620 is a wasteful number, since it uses less digits than its factorization.

11471565620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573578290 (or 573578288 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 11471565620 in words is "eleven billion, four hundred seventy-one million, five hundred sixty-five thousand, six hundred twenty".