78413525668 has 24 divisors (see below), whose sum is σ = 137800875968. Its totient is φ = 39042033696.

The previous prime is 78413525651. The next prime is 78413525669. The reversal of 78413525668 is 86652531487.

It is a happy number.

It is a super-2 number, since 2×78413525668² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78413525669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1724230 + ... + 1769122.

Almost surely, 2^78413525668 is an apocalyptic number.

It is an amenable number.

78413525668 is a deficient number, since it is larger than the sum of its proper divisors (59387350300).

78413525668 is a wasteful number, since it uses less digits than its factorization.

78413525668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46723 (or 46721 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 55.

The spelling of 78413525668 in words is "seventy-eight billion, four hundred thirteen million, five hundred twenty-five thousand, six hundred sixty-eight".