126274818540 has 96 divisors (see below), whose sum is σ = 382172829696. Its totient is φ = 30968282880.

The previous prime is 126274818529. The next prime is 126274818547. The reversal of 126274818540 is 45818472621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 126274818540.

It is not an unprimeable number, because it can be changed into a prime (126274818547) 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 31 ways as a sum of consecutive naturals, for example, 87312 + ... + 510071.

It is an arithmetic number, because the mean of its divisors is an integer number (3980966976).

Almost surely, 2^126274818540 is an apocalyptic number.

126274818540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126274818540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191086414848).

126274818540 is an abundant number, since it is smaller than the sum of its proper divisors (255898011156).

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

126274818540 is a wasteful number, since it uses less digits than its factorization.

126274818540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597679 (or 597677 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The spelling of 126274818540 in words is "one hundred twenty-six billion, two hundred seventy-four million, eight hundred eighteen thousand, five hundred forty".