728153176825991 has 16 divisors (see below), whose sum is σ = 871242687705600. Its totient is φ = 595349169904608.

The previous prime is 728153176825951. The next prime is 728153176825993. The reversal of 728153176825991 is 199528671351827.

It is not a de Polignac number, because 728153176825991 - 2⁶ = 728153176825927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728153176825993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21608184731 + ... + 21608218428.

It is an arithmetic number, because the mean of its divisors is an integer number (54452667981600).

Almost surely, 2^{728153176825991} is an apocalyptic number.

728153176825991 is a deficient number, since it is larger than the sum of its proper divisors (143089510879609).

728153176825991 is a wasteful number, since it uses less digits than its factorization.

728153176825991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43216403278.

The product of its digits is 457228800, while the sum is 74.

The spelling of 728153176825991 in words is "seven hundred twenty-eight trillion, one hundred fifty-three billion, one hundred seventy-six million, eight hundred twenty-five thousand, nine hundred ninety-one".