78384867612 has 24 divisors (see below), whose sum is σ = 192524236800. Its totient is φ = 24753116016.

The previous prime is 78384867611. The next prime is 78384867641. The reversal of 78384867612 is 21676848387.

It is a happy number.

It is a super-2 number, since 2×78384867612² (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 (78384867611) 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, 171896412 + ... + 171896867.

It is an arithmetic number, because the mean of its divisors is an integer number (8021843200).

Almost surely, 2^78384867612 is an apocalyptic number.

It is an amenable number.

78384867612 is an abundant number, since it is smaller than the sum of its proper divisors (114139369188).

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

78384867612 is a wasteful number, since it uses less digits than its factorization.

78384867612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343793305 (or 343793303 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 60.

The spelling of 78384867612 in words is "seventy-eight billion, three hundred eighty-four million, eight hundred sixty-seven thousand, six hundred twelve".