126340640356 has 12 divisors (see below), whose sum is σ = 252681280768. Its totient is φ = 54145988712.

The previous prime is 126340640323. The next prime is 126340640359. The reversal of 126340640356 is 653046043621.

It is a happy number.

126340640356 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (126340640359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2256082836 + ... + 2256082891.

Almost surely, 2^126340640356 is an apocalyptic number.

It is an amenable number.

126340640356 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

126340640356 is a wasteful number, since it uses less digits than its factorization.

126340640356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512165738 (or 4512165736 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 40.

Adding to 126340640356 its reverse (653046043621), we get a palindrome (779386683977).

The spelling of 126340640356 in words is "one hundred twenty-six billion, three hundred forty million, six hundred forty thousand, three hundred fifty-six".