12985805287 has 16 divisors (see below), whose sum is σ = 15999165952. Its totient is φ = 10263788640.

The previous prime is 12985805279. The next prime is 12985805291. The reversal of 12985805287 is 78250858921.

It is not a de Polignac number, because 12985805287 - 2³ = 12985805279 is a prime.

It is a super-2 number, since 2×12985805287² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12985805087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14212 + ... + 161782.

It is an arithmetic number, because the mean of its divisors is an integer number (999947872).

Almost surely, 2^12985805287 is an apocalyptic number.

12985805287 is a deficient number, since it is larger than the sum of its proper divisors (3013360665).

12985805287 is a wasteful number, since it uses less digits than its factorization.

12985805287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148558.

The product of its (nonzero) digits is 3225600, while the sum is 55.

The spelling of 12985805287 in words is "twelve billion, nine hundred eighty-five million, eight hundred five thousand, two hundred eighty-seven".