78378616284 has 48 divisors (see below), whose sum is σ = 185992886016. Its totient is φ = 25685568000.

The previous prime is 78378616279. The next prime is 78378616313. The reversal of 78378616284 is 48261687387.

It is a happy number.

It is a super-2 number, since 2×78378616284² (a number of 23 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 15 ways as a sum of consecutive naturals, for example, 47202 + ... + 398729.

It is an arithmetic number, because the mean of its divisors is an integer number (3874851792).

Almost surely, 2^78378616284 is an apocalyptic number.

It is an amenable number.

78378616284 is an abundant number, since it is smaller than the sum of its proper divisors (107614269732).

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

78378616284 is a wasteful number, since it uses less digits than its factorization.

78378616284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446186 (or 446184 counting only the distinct ones).

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

The spelling of 78378616284 in words is "seventy-eight billion, three hundred seventy-eight million, six hundred sixteen thousand, two hundred eighty-four".