2178642460071 has 32 divisors (see below), whose sum is σ = 3629889331200. Its totient is φ = 1129184218080.

The previous prime is 2178642460067. The next prime is 2178642460091. The reversal of 2178642460071 is 1700642468712.

It is not a de Polignac number, because 2178642460071 - 2² = 2178642460067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2178642460071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178642460031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10640451 + ... + 10843268.

It is an arithmetic number, because the mean of its divisors is an integer number (113434041600).

Almost surely, 2^{2178642460071} is an apocalyptic number.

2178642460071 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2178642460071 is a deficient number, since it is larger than the sum of its proper divisors (1451246871129).

2178642460071 is a wasteful number, since it uses less digits than its factorization.

2178642460071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21484179.

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 2178642460071 in words is "two trillion, one hundred seventy-eight billion, six hundred forty-two million, four hundred sixty thousand, seventy-one".