78743825778828 has 48 divisors (see below), whose sum is σ = 212513457542400. Its totient is φ = 22227172851264.

The previous prime is 78743825778799. The next prime is 78743825778859. The reversal of 78743825778828 is 82887752834787.

It is a Harshad number since it is a multiple of its sum of digits (84).

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, 5647140603 + ... + 5647154546.

It is an arithmetic number, because the mean of its divisors is an integer number (4427363698800).

Almost surely, 2^{78743825778828} is an apocalyptic number.

It is an amenable number.

78743825778828 is an abundant number, since it is smaller than the sum of its proper divisors (133769631763572).

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

78743825778828 is a wasteful number, since it uses less digits than its factorization.

78743825778828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11294295246 (or 11294295244 counting only the distinct ones).

The product of its digits is 18882232320, while the sum is 84.

The spelling of 78743825778828 in words is "seventy-eight trillion, seven hundred forty-three billion, eight hundred twenty-five million, seven hundred seventy-eight thousand, eight hundred twenty-eight".