78535478741828 has 12 divisors (see below), whose sum is σ = 140789211891132. Its totient is φ = 38309989630080.

The previous prime is 78535478741821. The next prime is 78535478741873. The reversal of 78535478741828 is 82814787453587.

78535478741828 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42442514803264 + 36092963938564 = 6514792^2 + 6007742^2 .

It is a hoax number, since the sum of its digits (77) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (78535478741821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239437435025 + ... + 239437435352.

It is an arithmetic number, because the mean of its divisors is an integer number (11732434324261).

Almost surely, 2^{78535478741828} is an apocalyptic number.

It is an amenable number.

78535478741828 is a deficient number, since it is larger than the sum of its proper divisors (62253733149304).

78535478741828 is a wasteful number, since it uses less digits than its factorization.

78535478741828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478874870422 (or 478874870420 counting only the distinct ones).

The product of its digits is 3371827200, while the sum is 77.

The spelling of 78535478741828 in words is "seventy-eight trillion, five hundred thirty-five billion, four hundred seventy-eight million, seven hundred forty-one thousand, eight hundred twenty-eight".