728623378783 has 4 divisors (see below), whose sum is σ = 728778310848. Its totient is φ = 728468446720.

The previous prime is 728623378757. The next prime is 728623378789. The reversal of 728623378783 is 387873326827.

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

It is a cyclic number.

It is not a de Polignac number, because 728623378783 - 2²⁵ = 728589824351 is a prime.

It is a super-2 number, since 2×728623378783² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728623378789) 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, 77458978 + ... + 77468383.

It is an arithmetic number, because the mean of its divisors is an integer number (182194577712).

Almost surely, 2^728623378783 is an apocalyptic number.

728623378783 is a deficient number, since it is larger than the sum of its proper divisors (154932065).

728623378783 is a wasteful number, since it uses less digits than its factorization.

728623378783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154932064.

The product of its digits is 113799168, while the sum is 64.

The spelling of 728623378783 in words is "seven hundred twenty-eight billion, six hundred twenty-three million, three hundred seventy-eight thousand, seven hundred eighty-three".