78102948784 has 80 divisors (see below), whose sum is σ = 175600744960. Its totient is φ = 32959664640.

The previous prime is 78102948767. The next prime is 78102948851. The reversal of 78102948784 is 48784920187.

It is a super-2 number, since 2×78102948784² (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, 5151487 + ... + 5166625.

It is an arithmetic number, because the mean of its divisors is an integer number (2195009312).

Almost surely, 2^78102948784 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 78102948784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87800372480).

78102948784 is an abundant number, since it is smaller than the sum of its proper divisors (97497796176).

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

78102948784 is a wasteful number, since it uses less digits than its factorization.

78102948784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15858 (or 15852 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 58.

The spelling of 78102948784 in words is "seventy-eight billion, one hundred two million, nine hundred forty-eight thousand, seven hundred eighty-four".