2971680638 has 16 divisors (see below), whose sum is σ = 4739090976. Its totient is φ = 1394421600.

The previous prime is 2971680619. The next prime is 2971680643. The reversal of 2971680638 is 8360861792.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607013 + ... + 611888.

It is an arithmetic number, because the mean of its divisors is an integer number (296193186).

Almost surely, 2^2971680638 is an apocalyptic number.

2971680638 is a deficient number, since it is larger than the sum of its proper divisors (1767410338).

2971680638 is a wasteful number, since it uses less digits than its factorization.

2971680638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218979.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 2971680638 is about 54513.1235391993. The cubic root of 2971680638 is about 1437.6970387297.

The spelling of 2971680638 in words is "two billion, nine hundred seventy-one million, six hundred eighty thousand, six hundred thirty-eight".