71984738574 has 24 divisors (see below), whose sum is σ = 178247924400. Its totient is φ = 20567068128.

The previous prime is 71984738549. The next prime is 71984738591. The reversal of 71984738574 is 47583748917.

71984738574 is a `hidden beast` number, since 7 + 1 + 98 + 473 + 8 + 5 + 74 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285653599 + ... + 285653850.

It is an arithmetic number, because the mean of its divisors is an integer number (7426996850).

Almost surely, 2^71984738574 is an apocalyptic number.

71984738574 is an abundant number, since it is smaller than the sum of its proper divisors (106263185826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71984738574 is a wasteful number, since it uses less digits than its factorization.

71984738574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571307464 (or 571307461 counting only the distinct ones).

The product of its digits is 47416320, while the sum is 63.

The spelling of 71984738574 in words is "seventy-one billion, nine hundred eighty-four million, seven hundred thirty-eight thousand, five hundred seventy-four".