721110013040542 has 8 divisors (see below), whose sum is σ = 1081665457205256. Its totient is φ = 360554860638792.

The previous prime is 721110013040491. The next prime is 721110013040579. The reversal of 721110013040542 is 245040310011127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66653448 + ... + 76713115.

It is an arithmetic number, because the mean of its divisors is an integer number (135208182150657).

Almost surely, 2^{721110013040542} is an apocalyptic number.

721110013040542 is a deficient number, since it is larger than the sum of its proper divisors (360555444164714).

721110013040542 is a wasteful number, since it uses less digits than its factorization.

721110013040542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145881482.

The product of its (nonzero) digits is 6720, while the sum is 31.

Adding to 721110013040542 its reverse (245040310011127), we get a palindrome (966150323051669).

The spelling of 721110013040542 in words is "seven hundred twenty-one trillion, one hundred ten billion, thirteen million, forty thousand, five hundred forty-two".