78177107081018 has 24 divisors (see below), whose sum is σ = 128897238786624. Its totient is φ = 35534517731240.

The previous prime is 78177107080999. The next prime is 78177107081041. The reversal of 78177107081018 is 81018070177187.

It is a happy number.

It is a super-3 number, since 3×78177107081018³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14048255 + ... + 18807117.

It is an arithmetic number, because the mean of its divisors is an integer number (5370718282776).

Almost surely, 2^{78177107081018} is an apocalyptic number.

78177107081018 is a deficient number, since it is larger than the sum of its proper divisors (50720131705606).

78177107081018 is a wasteful number, since it uses less digits than its factorization.

78177107081018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4826770 (or 4826759 counting only the distinct ones).

The product of its (nonzero) digits is 1229312, while the sum is 56.

The spelling of 78177107081018 in words is "seventy-eight trillion, one hundred seventy-seven billion, one hundred seven million, eighty-one thousand, eighteen".