71985000782 has 4 divisors (see below), whose sum is σ = 107977501176. Its totient is φ = 35992500390.

The previous prime is 71985000749. The next prime is 71985000793. The reversal of 71985000782 is 28700058917.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×71985000782² (a number of 23 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 17996250194 + ... + 17996250197.

It is an arithmetic number, because the mean of its divisors is an integer number (26994375294).

Almost surely, 2^71985000782 is an apocalyptic number.

71985000782 is a deficient number, since it is larger than the sum of its proper divisors (35992500394).

71985000782 is a wasteful number, since it uses less digits than its factorization.

71985000782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35992500393.

The product of its (nonzero) digits is 282240, while the sum is 47.

The spelling of 71985000782 in words is "seventy-one billion, nine hundred eighty-five million, seven hundred eighty-two", and thus it is an aban number.