72126857236 has 48 divisors (see below), whose sum is σ = 154091016576. Its totient is φ = 28835702784.

The previous prime is 72126857233. The next prime is 72126857237. The reversal of 72126857236 is 63275862127.

It is a self number, because there is not a number n which added to its sum of digits gives 72126857236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72126857233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 616686 + ... + 724261.

It is an arithmetic number, because the mean of its divisors is an integer number (3210229512).

Almost surely, 2^72126857236 is an apocalyptic number.

It is an amenable number.

72126857236 is an abundant number, since it is smaller than the sum of its proper divisors (81964159340).

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

72126857236 is a wasteful number, since it uses less digits than its factorization.

72126857236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341088 (or 1341086 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 49.

The spelling of 72126857236 in words is "seventy-two billion, one hundred twenty-six million, eight hundred fifty-seven thousand, two hundred thirty-six".