11640533720 has 32 divisors (see below), whose sum is σ = 26237282400. Its totient is φ = 4648021248.

The previous prime is 11640533713. The next prime is 11640533731. The reversal of 11640533720 is 2733504611.

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, 232964 + ... + 278483.

It is an arithmetic number, because the mean of its divisors is an integer number (819915075).

Almost surely, 2^11640533720 is an apocalyptic number.

11640533720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11640533720 is an abundant number, since it is smaller than the sum of its proper divisors (14596748680).

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

11640533720 is a wasteful number, since it uses less digits than its factorization.

11640533720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512027 (or 512023 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 11640533720 in words is "eleven billion, six hundred forty million, five hundred thirty-three thousand, seven hundred twenty".