78853696281 has 12 divisors (see below), whose sum is σ = 114719208240. Its totient is φ = 52190934840.

The previous prime is 78853696277. The next prime is 78853696289. The reversal of 78853696281 is 18269635887.

78853696281 is a `hidden beast` number, since 7 + 8 + 8 + 536 + 96 + 2 + 8 + 1 = 666.

It is not a de Polignac number, because 78853696281 - 2² = 78853696277 is a prime.

It is a super-4 number, since 4×78853696281⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (78853696289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31515015 + ... + 31517516.

It is an arithmetic number, because the mean of its divisors is an integer number (9559934020).

Almost surely, 2^78853696281 is an apocalyptic number.

It is an amenable number.

78853696281 is a deficient number, since it is larger than the sum of its proper divisors (35865511959).

78853696281 is a wasteful number, since it uses less digits than its factorization.

78853696281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63032676 (or 63032673 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 78853696281 in words is "seventy-eight billion, eight hundred fifty-three million, six hundred ninety-six thousand, two hundred eighty-one".