78210573117 has 16 divisors (see below), whose sum is σ = 104554391040. Its totient is φ = 52003652400.

The previous prime is 78210573097. The next prime is 78210573163. The reversal of 78210573117 is 71137501287.

It is not a de Polignac number, because 78210573117 - 2¹⁵ = 78210540349 is a prime.

It is a super-2 number, since 2×78210573117² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78210573517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4589142 + ... + 4606152.

It is an arithmetic number, because the mean of its divisors is an integer number (6534649440).

Almost surely, 2^78210573117 is an apocalyptic number.

It is an amenable number.

78210573117 is a deficient number, since it is larger than the sum of its proper divisors (26343817923).

78210573117 is a wasteful number, since it uses less digits than its factorization.

78210573117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20944.

The product of its (nonzero) digits is 82320, while the sum is 42.

The spelling of 78210573117 in words is "seventy-eight billion, two hundred ten million, five hundred seventy-three thousand, one hundred seventeen".