71781464972014 has 64 divisors (see below), whose sum is σ = 126085302706176. Its totient is φ = 30007596213504.

The previous prime is 71781464971921. The next prime is 71781464972047. The reversal of 71781464972014 is 41027946418717.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1618244724 + ... + 1618289080.

It is an arithmetic number, because the mean of its divisors is an integer number (1970082854784).

Almost surely, 2^{71781464972014} is an apocalyptic number.

71781464972014 is a deficient number, since it is larger than the sum of its proper divisors (54303837734162).

71781464972014 is a wasteful number, since it uses less digits than its factorization.

71781464972014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47969.

The product of its (nonzero) digits is 18966528, while the sum is 61.

The spelling of 71781464972014 in words is "seventy-one trillion, seven hundred eighty-one billion, four hundred sixty-four million, nine hundred seventy-two thousand, fourteen".