728757413771 has 4 divisors (see below), whose sum is σ = 771625496952. Its totient is φ = 685889330592.

The previous prime is 728757413749. The next prime is 728757413773. The reversal of 728757413771 is 177314757827.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728757413771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 728757413771.

It is not an unprimeable number, because it can be changed into a prime (728757413773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21434041565 + ... + 21434041598.

It is an arithmetic number, because the mean of its divisors is an integer number (192906374238).

Almost surely, 2^728757413771 is an apocalyptic number.

728757413771 is a deficient number, since it is larger than the sum of its proper divisors (42868083181).

728757413771 is a wasteful number, since it uses less digits than its factorization.

728757413771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42868083180.

The product of its digits is 16134720, while the sum is 59.

The spelling of 728757413771 in words is "seven hundred twenty-eight billion, seven hundred fifty-seven million, four hundred thirteen thousand, seven hundred seventy-one".