78616664473 has 8 divisors (see below), whose sum is σ = 78901522056. Its totient is φ = 78331920000.

The previous prime is 78616664471. The next prime is 78616664479. The reversal of 78616664473 is 37446661687.

It can be written as a sum of positive squares in 4 ways, for example, as 52820449929 + 25796214544 = 229827^2 + 160612^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78616664473 - 2¹ = 78616664471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78616664471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1515973 + ... + 1566973.

It is an arithmetic number, because the mean of its divisors is an integer number (9862690257).

Almost surely, 2^78616664473 is an apocalyptic number.

It is an amenable number.

78616664473 is a deficient number, since it is larger than the sum of its proper divisors (284857583).

78616664473 is a wasteful number, since it uses less digits than its factorization.

78616664473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56555.

The product of its digits is 24385536, while the sum is 58.

The spelling of 78616664473 in words is "seventy-eight billion, six hundred sixteen million, six hundred sixty-four thousand, four hundred seventy-three".