78673817380 has 48 divisors (see below), whose sum is σ = 169210641600. Its totient is φ = 30709784448.

The previous prime is 78673817377. The next prime is 78673817437. The reversal of 78673817380 is 8371837687.

It is a super-2 number, since 2×78673817380² (a number of 23 digits) contains 22 as substring.

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, 919671 + ... + 1001569.

It is an arithmetic number, because the mean of its divisors is an integer number (3525221700).

Almost surely, 2^78673817380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78673817380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84605320800).

78673817380 is an abundant number, since it is smaller than the sum of its proper divisors (90536824220).

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

78673817380 is a wasteful number, since it uses less digits than its factorization.

78673817380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83068 (or 83066 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 58.

The spelling of 78673817380 in words is "seventy-eight billion, six hundred seventy-three million, eight hundred seventeen thousand, three hundred eighty".