721062857387 has 8 divisors (see below), whose sum is σ = 726357010176. Its totient is φ = 715780328872.

The previous prime is 721062857377. The next prime is 721062857399. The reversal of 721062857387 is 783758260127.

721062857387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 721062857387 - 2⁴ = 721062857371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721062857377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2781533 + ... + 3029694.

It is an arithmetic number, because the mean of its divisors is an integer number (90794626272).

Almost surely, 2^721062857387 is an apocalyptic number.

721062857387 is a deficient number, since it is larger than the sum of its proper divisors (5294152789).

721062857387 is a wasteful number, since it uses less digits than its factorization.

721062857387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5812137.

The product of its (nonzero) digits is 7902720, while the sum is 56.

The spelling of 721062857387 in words is "seven hundred twenty-one billion, sixty-two million, eight hundred fifty-seven thousand, three hundred eighty-seven".