78306138292 has 48 divisors (see below), whose sum is σ = 144334911168. Its totient is φ = 37123764480.

The previous prime is 78306138289. The next prime is 78306138301. The reversal of 78306138292 is 29283160387.

It is a super-2 number, since 2×78306138292² (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 15 ways as a sum of consecutive naturals, for example, 5739583 + ... + 5753209.

It is an arithmetic number, because the mean of its divisors is an integer number (3006977316).

Almost surely, 2^78306138292 is an apocalyptic number.

It is an amenable number.

78306138292 is a deficient number, since it is larger than the sum of its proper divisors (66028772876).

78306138292 is a wasteful number, since it uses less digits than its factorization.

78306138292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14656 (or 14654 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 78306138292 in words is "seventy-eight billion, three hundred six million, one hundred thirty-eight thousand, two hundred ninety-two".