478640728191 has 16 divisors (see below), whose sum is σ = 643195010304. Its totient is φ = 316592662464.

The previous prime is 478640728177. The next prime is 478640728217. The reversal of 478640728191 is 191827046874.

It is not a de Polignac number, because 478640728191 - 2⁶ = 478640728127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478640728151) 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, 443856 + ... + 1074378.

It is an arithmetic number, because the mean of its divisors is an integer number (40199688144).

Almost surely, 2^478640728191 is an apocalyptic number.

478640728191 is a deficient number, since it is larger than the sum of its proper divisors (164554282113).

478640728191 is a wasteful number, since it uses less digits than its factorization.

478640728191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632510.

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 478640728191 in words is "four hundred seventy-eight billion, six hundred forty million, seven hundred twenty-eight thousand, one hundred ninety-one".