728700081191 has 2 divisors, whose sum is σ = 728700081192. Its totient is φ = 728700081190.

The previous prime is 728700081173. The next prime is 728700081199. The reversal of 728700081191 is 191180007827.

728700081191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728700081191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728700081199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364350040595 + 364350040596.

It is an arithmetic number, because the mean of its divisors is an integer number (364350040596).

Almost surely, 2^728700081191 is an apocalyptic number.

728700081191 is a deficient number, since it is larger than the sum of its proper divisors (1).

728700081191 is an equidigital number, since it uses as much as digits as its factorization.

728700081191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 44.

The spelling of 728700081191 in words is "seven hundred twenty-eight billion, seven hundred million, eighty-one thousand, one hundred ninety-one".