728078665947563 has 32 divisors (see below), whose sum is σ = 847154729963520. Its totient is φ = 612842646769920.

The previous prime is 728078665947541. The next prime is 728078665947617. The reversal of 728078665947563 is 365749566870827.

It is not a de Polignac number, because 728078665947563 - 2⁶ = 728078665947499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728078665347563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145093745 + ... + 150027837.

It is an arithmetic number, because the mean of its divisors is an integer number (26473585311360).

Almost surely, 2^{728078665947563} is an apocalyptic number.

728078665947563 is a deficient number, since it is larger than the sum of its proper divisors (119076064015957).

728078665947563 is a wasteful number, since it uses less digits than its factorization.

728078665947563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4935347.

The product of its (nonzero) digits is 25604812800, while the sum is 83.

The spelling of 728078665947563 in words is "seven hundred twenty-eight trillion, seventy-eight billion, six hundred sixty-five million, nine hundred forty-seven thousand, five hundred sixty-three".