12291426740 has 12 divisors (see below), whose sum is σ = 25811996196. Its totient is φ = 4916570688.

The previous prime is 12291426733. The next prime is 12291426773. The reversal of 12291426740 is 4762419221.

It can be written as a sum of positive squares in 2 ways, for example, as 2842809124 + 9448617616 = 53318^2 + 97204^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12291426694 and 12291426703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307285649 + ... + 307285688.

It is an arithmetic number, because the mean of its divisors is an integer number (2150999683).

Almost surely, 2^12291426740 is an apocalyptic number.

12291426740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12291426740 is an abundant number, since it is smaller than the sum of its proper divisors (13520569456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12291426740 is a wasteful number, since it uses less digits than its factorization.

12291426740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614571346 (or 614571344 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 12291426740 in words is "twelve billion, two hundred ninety-one million, four hundred twenty-six thousand, seven hundred forty".