12591779463 has 24 divisors (see below), whose sum is σ = 18444114000. Its totient is φ = 8277197184.

The previous prime is 12591779449. The next prime is 12591779467. The reversal of 12591779463 is 36497719521.

12591779463 is a `hidden beast` number, since 1 + 2 + 5 + 9 + 177 + 9 + 463 = 666.

It is not a de Polignac number, because 12591779463 - 2²⁴ = 12575002247 is a prime.

It is a super-3 number, since 3×12591779463³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12591779467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149448 + ... + 217986.

It is an arithmetic number, because the mean of its divisors is an integer number (768504750).

Almost surely, 2^12591779463 is an apocalyptic number.

12591779463 is a deficient number, since it is larger than the sum of its proper divisors (5852334537).

12591779463 is a wasteful number, since it uses less digits than its factorization.

12591779463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68831 (or 68828 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The spelling of 12591779463 in words is "twelve billion, five hundred ninety-one million, seven hundred seventy-nine thousand, four hundred sixty-three".