11990872530 has 256 divisors, whose sum is σ = 39649075200. Its totient is φ = 2511025920.

The previous prime is 11990872511. The next prime is 11990872577. The reversal of 11990872530 is 3527809911.

11990872530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3413475 + ... + 3416985.

It is an arithmetic number, because the mean of its divisors is an integer number (154879200).

Almost surely, 2^11990872530 is an apocalyptic number.

11990872530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11990872530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19824537600).

11990872530 is an abundant number, since it is smaller than the sum of its proper divisors (27658202670).

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

11990872530 is a wasteful number, since it uses less digits than its factorization.

11990872530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686 (or 3680 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The spelling of 11990872530 in words is "eleven billion, nine hundred ninety million, eight hundred seventy-two thousand, five hundred thirty".