78215753316846 has 8 divisors (see below), whose sum is σ = 156431506633704. Its totient is φ = 26071917772280.

The previous prime is 78215753316809. The next prime is 78215753316853. The reversal of 78215753316846 is 64861335751287.

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

78215753316846 is an admirable number.

It is a super-2 number, since 2×78215753316846² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6517979443065 + ... + 6517979443076.

It is an arithmetic number, because the mean of its divisors is an integer number (19553938329213).

Almost surely, 2^{78215753316846} is an apocalyptic number.

78215753316846 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78215753316846 is a wasteful number, since it uses less digits than its factorization.

78215753316846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13035958886146.

The product of its digits is 203212800, while the sum is 66.

The spelling of 78215753316846 in words is "seventy-eight trillion, two hundred fifteen billion, seven hundred fifty-three million, three hundred sixteen thousand, eight hundred forty-six".