12816812431 has 8 divisors (see below), whose sum is σ = 13800756240. Its totient is φ = 11858425728.

The previous prime is 12816812423. The next prime is 12816812461. The reversal of 12816812431 is 13421861821.

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

It is a cyclic number.

It is not a de Polignac number, because 12816812431 - 2³ = 12816812423 is a prime.

It is a super-2 number, since 2×12816812431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12816812461) 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, 6388236 + ... + 6390241.

It is an arithmetic number, because the mean of its divisors is an integer number (1725094530).

Almost surely, 2^12816812431 is an apocalyptic number.

12816812431 is a deficient number, since it is larger than the sum of its proper divisors (983943809).

12816812431 is a wasteful number, since it uses less digits than its factorization.

12816812431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12778553.

The product of its digits is 18432, while the sum is 37.

The spelling of 12816812431 in words is "twelve billion, eight hundred sixteen million, eight hundred twelve thousand, four hundred thirty-one".