726120505242 has 80 divisors (see below), whose sum is σ = 1785221884512. Its totient is φ = 218764536480.

The previous prime is 726120505217. The next prime is 726120505259. The reversal of 726120505242 is 242505021627.

726120505242 is a `hidden beast` number, since 7 + 2 + 6 + 120 + 5 + 0 + 524 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 726120505197 and 726120505206.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 869388 + ... + 1485959.

Almost surely, 2^726120505242 is an apocalyptic number.

726120505242 is an abundant number, since it is smaller than the sum of its proper divisors (1059101379270).

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

726120505242 is a wasteful number, since it uses less digits than its factorization.

726120505242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355545 (or 2355536 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

Adding to 726120505242 its reverse (242505021627), we get a palindrome (968625526869).

The spelling of 726120505242 in words is "seven hundred twenty-six billion, one hundred twenty million, five hundred five thousand, two hundred forty-two".