12654379991 has 16 divisors (see below), whose sum is σ = 14033972736. Its totient is φ = 11314500000.

The previous prime is 12654379987. The next prime is 12654380023. The reversal of 12654379991 is 19997345621.

12654379991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12654379991 - 2² = 12654379987 is a prime.

It is a super-3 number, since 3×12654379991³ (a number of 31 digits) contains 333 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 (12654379901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130046 + ... + 205476.

It is an arithmetic number, because the mean of its divisors is an integer number (877123296).

Almost surely, 2^12654379991 is an apocalyptic number.

12654379991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12654379991 is a deficient number, since it is larger than the sum of its proper divisors (1379592745).

12654379991 is a wasteful number, since it uses less digits than its factorization.

12654379991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75694.

The product of its digits is 3674160, while the sum is 56.

The spelling of 12654379991 in words is "twelve billion, six hundred fifty-four million, three hundred seventy-nine thousand, nine hundred ninety-one".