78069785850 has 96 divisors (see below), whose sum is σ = 245857895040. Its totient is φ = 17844520320.

The previous prime is 78069785839. The next prime is 78069785851. The reversal of 78069785850 is 5858796087.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (78069785851) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4121227 + ... + 4140126.

It is an arithmetic number, because the mean of its divisors is an integer number (2561019740).

Almost surely, 2^78069785850 is an apocalyptic number.

78069785850 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78069785850 is an abundant number, since it is smaller than the sum of its proper divisors (167788109190).

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

78069785850 is a wasteful number, since it uses less digits than its factorization.

78069785850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8261381 (or 8261370 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 63.

The spelling of 78069785850 in words is "seventy-eight billion, sixty-nine million, seven hundred eighty-five thousand, eight hundred fifty".