2177138542870 has 64 divisors (see below), whose sum is σ = 4262161026816. Its totient is φ = 797457899520.

The previous prime is 2177138542849. The next prime is 2177138542927. The reversal of 2177138542870 is 782458317712.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 2132434 + ... + 2983546.

It is an arithmetic number, because the mean of its divisors is an integer number (66596266044).

Almost surely, 2^{2177138542870} is an apocalyptic number.

2177138542870 is a deficient number, since it is larger than the sum of its proper divisors (2085022483946).

2177138542870 is a wasteful number, since it uses less digits than its factorization.

2177138542870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851545.

The product of its (nonzero) digits is 5268480, while the sum is 55.

The spelling of 2177138542870 in words is "two trillion, one hundred seventy-seven billion, one hundred thirty-eight million, five hundred forty-two thousand, eight hundred seventy".