71540411984 has 20 divisors (see below), whose sum is σ = 138740221620. Its totient is φ = 35736483840.

The previous prime is 71540411951. The next prime is 71540412019. The reversal of 71540411984 is 48911404517.

It can be written as a sum of positive squares in 2 ways, for example, as 44467000384 + 27073411600 = 210872^2 + 164540^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090129 + ... + 2124080.

It is an arithmetic number, because the mean of its divisors is an integer number (6937011081).

Almost surely, 2^71540411984 is an apocalyptic number.

It is an amenable number.

71540411984 is a deficient number, since it is larger than the sum of its proper divisors (67199809636).

71540411984 is a wasteful number, since it uses less digits than its factorization.

71540411984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4215278 (or 4215272 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 71540411984 in words is "seventy-one billion, five hundred forty million, four hundred eleven thousand, nine hundred eighty-four".