78255850830 has 64 divisors (see below), whose sum is σ = 189796359168. Its totient is φ = 20648956160.

The previous prime is 78255850823. The next prime is 78255850873. The reversal of 78255850830 is 3805855287.

It is a happy number.

It is a super-2 number, since 2×78255850830² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1247599 + ... + 1308821.

It is an arithmetic number, because the mean of its divisors is an integer number (2965568112).

Almost surely, 2^78255850830 is an apocalyptic number.

78255850830 is an abundant number, since it is smaller than the sum of its proper divisors (111540508338).

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

78255850830 is a wasteful number, since it uses less digits than its factorization.

78255850830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61681.

The product of its (nonzero) digits is 2688000, while the sum is 51.

The spelling of 78255850830 in words is "seventy-eight billion, two hundred fifty-five million, eight hundred fifty thousand, eight hundred thirty".