71682777478 has 32 divisors (see below), whose sum is σ = 121914223200. Its totient is φ = 31336782336.

The previous prime is 71682777469. The next prime is 71682777479. The reversal of 71682777478 is 87477728617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71682777479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3136878 + ... + 3159646.

It is an arithmetic number, because the mean of its divisors is an integer number (3809819475).

Almost surely, 2^71682777478 is an apocalyptic number.

71682777478 is a deficient number, since it is larger than the sum of its proper divisors (50231445722).

71682777478 is a wasteful number, since it uses less digits than its factorization.

71682777478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29176.

The product of its digits is 51631104, while the sum is 64.

The spelling of 71682777478 in words is "seventy-one billion, six hundred eighty-two million, seven hundred seventy-seven thousand, four hundred seventy-eight".