726123025540 has 72 divisors (see below), whose sum is σ = 1676408181336. Its totient is φ = 263993664000.

The previous prime is 726123025501. The next prime is 726123025549. The reversal of 726123025540 is 45520321627.

It can be written as a sum of positive squares in 4 ways, for example, as 32990183424 + 693132842116 = 181632^2 + 832546^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 726123025540.

It is not an unprimeable number, because it can be changed into a prime (726123025549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13857390 + ... + 13909690.

It is an arithmetic number, because the mean of its divisors is an integer number (23283446963).

Almost surely, 2^726123025540 is an apocalyptic number.

It is an amenable number.

726123025540 is an abundant number, since it is smaller than the sum of its proper divisors (950285155796).

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

726123025540 is a wasteful number, since it uses less digits than its factorization.

726123025540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58069 (or 58056 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 726123025540 in words is "seven hundred twenty-six billion, one hundred twenty-three million, twenty-five thousand, five hundred forty".