12856253530 has 8 divisors (see below), whose sum is σ = 23141256372. Its totient is φ = 5142501408.

The previous prime is 12856253491. The next prime is 12856253533. The reversal of 12856253530 is 3535265821.

It can be written as a sum of positive squares in 2 ways, for example, as 11844186561 + 1012066969 = 108831^2 + 31813^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12856253533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642812667 + ... + 642812686.

Almost surely, 2^12856253530 is an apocalyptic number.

12856253530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12856253530 is a deficient number, since it is larger than the sum of its proper divisors (10285002842).

12856253530 is a wasteful number, since it uses less digits than its factorization.

12856253530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285625360.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 12856253530 in words is "twelve billion, eight hundred fifty-six million, two hundred fifty-three thousand, five hundred thirty".