2178647061 has 8 divisors (see below), whose sum is σ = 2983372704. Its totient is φ = 1413176400.

The previous prime is 2178647017. The next prime is 2178647077. The reversal of 2178647061 is 1607468712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2178647061 - 2¹⁵ = 2178614293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178646061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9813615 + ... + 9813836.

It is an arithmetic number, because the mean of its divisors is an integer number (372921588).

Almost surely, 2^2178647061 is an apocalyptic number.

It is an amenable number.

2178647061 is a deficient number, since it is larger than the sum of its proper divisors (804725643).

2178647061 is a wasteful number, since it uses less digits than its factorization.

2178647061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19627491.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 2178647061 is about 46675.9794862411. The cubic root of 2178647061 is about 1296.3699640841.

The spelling of 2178647061 in words is "two billion, one hundred seventy-eight million, six hundred forty-seven thousand, sixty-one".