11836685520 has 280 divisors, whose sum is σ = 45015056352. Its totient is φ = 2869344000.

The previous prime is 11836685491. The next prime is 11836685573. The reversal of 11836685520 is 2558663811.

11836685520 is a `hidden beast` number, since 1 + 1 + 8 + 36 + 68 + 552 + 0 = 666.

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 55 ways as a sum of consecutive naturals, for example, 632295 + ... + 650745.

Almost surely, 2^11836685520 is an apocalyptic number.

11836685520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11836685520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22507528176).

11836685520 is an abundant number, since it is smaller than the sum of its proper divisors (33178370832).

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

11836685520 is a wasteful number, since it uses less digits than its factorization.

11836685520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18493 (or 18472 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 11836685520 in words is "eleven billion, eight hundred thirty-six million, six hundred eighty-five thousand, five hundred twenty".