12281856987 has 8 divisors (see below), whose sum is σ = 16376441920. Its totient is φ = 8187588360.

The previous prime is 12281856959. The next prime is 12281856991. The reversal of 12281856987 is 78965818221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12281856987 is a prime.

It is a super-2 number, since 2×12281856987² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12281846987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35064 + ... + 160602.

It is an arithmetic number, because the mean of its divisors is an integer number (2047055240).

Almost surely, 2^12281856987 is an apocalyptic number.

12281856987 is a deficient number, since it is larger than the sum of its proper divisors (4094584933).

12281856987 is a wasteful number, since it uses less digits than its factorization.

12281856987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158153.

The product of its digits is 3870720, while the sum is 57.

The spelling of 12281856987 in words is "twelve billion, two hundred eighty-one million, eight hundred fifty-six thousand, nine hundred eighty-seven".