78877825878842 has 16 divisors (see below), whose sum is σ = 121068908331360. Its totient is φ = 38521532457072.

The previous prime is 78877825878749. The next prime is 78877825878853. The reversal of 78877825878842 is 24887852877887.

78877825878842 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×78877825878842² (a number of 29 digits) contains 22 as substring.

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, 15399653 + ... + 19872215.

It is an arithmetic number, because the mean of its divisors is an integer number (7566806770710).

Almost surely, 2^{78877825878842} is an apocalyptic number.

78877825878842 is a deficient number, since it is larger than the sum of its proper divisors (42191082452518).

78877825878842 is a wasteful number, since it uses less digits than its factorization.

78877825878842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4677677.

The product of its digits is 50352619520, while the sum is 89.

The spelling of 78877825878842 in words is "seventy-eight trillion, eight hundred seventy-seven billion, eight hundred twenty-five million, eight hundred seventy-eight thousand, eight hundred forty-two".