12856787540 has 48 divisors (see below), whose sum is σ = 28865071872. Its totient is φ = 4793197056.

The previous prime is 12856787539. The next prime is 12856787569. The reversal of 12856787540 is 4578765821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148544 + ... + 218583.

It is an arithmetic number, because the mean of its divisors is an integer number (601355664).

Almost surely, 2^12856787540 is an apocalyptic number.

12856787540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12856787540 is an abundant number, since it is smaller than the sum of its proper divisors (16008284332).

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

12856787540 is a wasteful number, since it uses less digits than its factorization.

12856787540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367256 (or 367254 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 12856787540 in words is "twelve billion, eight hundred fifty-six million, seven hundred eighty-seven thousand, five hundred forty".