71771982782 has 64 divisors (see below), whose sum is σ = 118468915200. Its totient is φ = 32480259840.

The previous prime is 71771982743. The next prime is 71771982809. The reversal of 71771982782 is 28728917717.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65069243 + ... + 65070345.

It is an arithmetic number, because the mean of its divisors is an integer number (1851076800).

Almost surely, 2^71771982782 is an apocalyptic number.

71771982782 is a deficient number, since it is larger than the sum of its proper divisors (46696932418).

71771982782 is a wasteful number, since it uses less digits than its factorization.

71771982782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721.

The product of its digits is 5531904, while the sum is 59.

The spelling of 71771982782 in words is "seventy-one billion, seven hundred seventy-one million, nine hundred eighty-two thousand, seven hundred eighty-two".