78224747768 has 32 divisors (see below), whose sum is σ = 147107016000. Its totient is φ = 38996313600.

The previous prime is 78224747759. The next prime is 78224747789. The reversal of 78224747768 is 86774742287.

It is a super-2 number, since 2×78224747768² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78224747768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7687388 + ... + 7697556.

It is an arithmetic number, because the mean of its divisors is an integer number (4597094250).

Almost surely, 2^78224747768 is an apocalyptic number.

It is an amenable number.

78224747768 is a deficient number, since it is larger than the sum of its proper divisors (68882268232).

78224747768 is a wasteful number, since it uses less digits than its factorization.

78224747768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12935 (or 12931 counting only the distinct ones).

The product of its digits is 59006976, while the sum is 62.

The spelling of 78224747768 in words is "seventy-eight billion, two hundred twenty-four million, seven hundred forty-seven thousand, seven hundred sixty-eight".