78316858853 has 8 divisors (see below), whose sum is σ = 78592363416. Its totient is φ = 78041779200.

The previous prime is 78316858819. The next prime is 78316858877. The reversal of 78316858853 is 35885861387.

It can be written as a sum of positive squares in 4 ways, for example, as 1655431969 + 76661426884 = 40687^2 + 276878^2 .

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 78316858853 - 2¹² = 78316854757 is a prime.

It is a super-2 number, since 2×78316858853² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78316858813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265325 + ... + 476477.

It is an arithmetic number, because the mean of its divisors is an integer number (9824045427).

Almost surely, 2^78316858853 is an apocalyptic number.

It is an amenable number.

78316858853 is a deficient number, since it is larger than the sum of its proper divisors (275504563).

78316858853 is a wasteful number, since it uses less digits than its factorization.

78316858853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212455.

The product of its digits is 38707200, while the sum is 62.

The spelling of 78316858853 in words is "seventy-eight billion, three hundred sixteen million, eight hundred fifty-eight thousand, eight hundred fifty-three".