12056139520 has 72 divisors (see below), whose sum is σ = 28897099056. Its totient is φ = 4819304448.

The previous prime is 12056139461. The next prime is 12056139541. The reversal of 12056139520 is 2593165021.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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, 3637384 + ... + 3640696.

It is an arithmetic number, because the mean of its divisors is an integer number (401348598).

Almost surely, 2^12056139520 is an apocalyptic number.

12056139520 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 12056139520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14448549528).

12056139520 is an abundant number, since it is smaller than the sum of its proper divisors (16840959536).

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

12056139520 is an equidigital number, since it uses as much as digits as its factorization.

12056139520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6177 (or 6163 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The spelling of 12056139520 in words is "twelve billion, fifty-six million, one hundred thirty-nine thousand, five hundred twenty".