727299139021 has 16 divisors (see below), whose sum is σ = 895177360000. Its totient is φ = 575419785408.

The previous prime is 727299139013. The next prime is 727299139027. The reversal of 727299139021 is 120931992727.

It is not a de Polignac number, because 727299139021 - 2³ = 727299139013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 727299139021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727299139027) 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 15 ways as a sum of consecutive naturals, for example, 2019355 + ... + 2352103.

It is an arithmetic number, because the mean of its divisors is an integer number (55948585000).

Almost surely, 2^727299139021 is an apocalyptic number.

It is an amenable number.

727299139021 is a deficient number, since it is larger than the sum of its proper divisors (167878220979).

727299139021 is a wasteful number, since it uses less digits than its factorization.

727299139021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356788.

The product of its (nonzero) digits is 857304, while the sum is 52.

The spelling of 727299139021 in words is "seven hundred twenty-seven billion, two hundred ninety-nine million, one hundred thirty-nine thousand, twenty-one".