78164464120 has 16 divisors (see below), whose sum is σ = 175870044360. Its totient is φ = 31265785632.

The previous prime is 78164464111. The next prime is 78164464123. The reversal of 78164464120 is 2146446187.

It is a happy number.

It is a super-2 number, since 2×78164464120² (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 (78164464123) 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 3 ways as a sum of consecutive naturals, for example, 977055762 + ... + 977055841.

Almost surely, 2^78164464120 is an apocalyptic number.

It is an amenable number.

78164464120 is an abundant number, since it is smaller than the sum of its proper divisors (97705580240).

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

78164464120 is a wasteful number, since it uses less digits than its factorization.

78164464120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954111614 (or 1954111610 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 78164464120 in words is "seventy-eight billion, one hundred sixty-four million, four hundred sixty-four thousand, one hundred twenty".