78472856797 has 16 divisors (see below), whose sum is σ = 85666678272. Its totient is φ = 71672106880.

The previous prime is 78472856773. The next prime is 78472856827. The reversal of 78472856797 is 79765827487.

It is not a de Polignac number, because 78472856797 - 2¹⁵ = 78472824029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78472859797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 840958 + ... + 929599.

It is an arithmetic number, because the mean of its divisors is an integer number (5354167392).

Almost surely, 2^78472856797 is an apocalyptic number.

It is an amenable number.

78472856797 is a deficient number, since it is larger than the sum of its proper divisors (7193821475).

78472856797 is a wasteful number, since it uses less digits than its factorization.

78472856797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770668.

The product of its digits is 331914240, while the sum is 70.

The spelling of 78472856797 in words is "seventy-eight billion, four hundred seventy-two million, eight hundred fifty-six thousand, seven hundred ninety-seven".