78125575246858 has 32 divisors (see below), whose sum is σ = 121464366218496. Its totient is φ = 37671084315648.

The previous prime is 78125575246853. The next prime is 78125575246867. The reversal of 78125575246858 is 85864257552187.

It is a super-2 number, since 2×78125575246858² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (73).

It is not an unprimeable number, because it can be changed into a prime (78125575246853) 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 15 ways as a sum of consecutive naturals, for example, 32056866 + ... + 34407757.

It is an arithmetic number, because the mean of its divisors is an integer number (3795761444328).

Almost surely, 2^{78125575246858} is an apocalyptic number.

78125575246858 is a deficient number, since it is larger than the sum of its proper divisors (43338790971638).

78125575246858 is a wasteful number, since it uses less digits than its factorization.

78125575246858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66464878.

The product of its digits is 1505280000, while the sum is 73.

The spelling of 78125575246858 in words is "seventy-eight trillion, one hundred twenty-five billion, five hundred seventy-five million, two hundred forty-six thousand, eight hundred fifty-eight".