2177138542818 has 32 divisors (see below), whose sum is σ = 4406995262592. Its totient is φ = 716959958400.

The previous prime is 2177138542811. The next prime is 2177138542837. The reversal of 2177138542818 is 8182458317712.

It is a super-2 number, since 2×2177138542818² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2177138542811) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3923763 + ... + 4444118.

It is an arithmetic number, because the mean of its divisors is an integer number (137718601956).

Almost surely, 2^{2177138542818} is an apocalyptic number.

2177138542818 is an abundant number, since it is smaller than the sum of its proper divisors (2229856719774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2177138542818 is a wasteful number, since it uses less digits than its factorization.

2177138542818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8368410.

The product of its digits is 6021120, while the sum is 57.

The spelling of 2177138542818 in words is "two trillion, one hundred seventy-seven billion, one hundred thirty-eight million, five hundred forty-two thousand, eight hundred eighteen".