71387544740 has 12 divisors (see below), whose sum is σ = 149913843996. Its totient is φ = 28555017888.

The previous prime is 71387544703. The next prime is 71387544751. The reversal of 71387544740 is 4744578317.

It can be written as a sum of positive squares in 2 ways, for example, as 12415307776 + 58972236964 = 111424^2 + 242842^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1784688599 + ... + 1784688638.

It is an arithmetic number, because the mean of its divisors is an integer number (12492820333).

Almost surely, 2^71387544740 is an apocalyptic number.

It is an amenable number.

71387544740 is an abundant number, since it is smaller than the sum of its proper divisors (78526299256).

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

71387544740 is a wasteful number, since it uses less digits than its factorization.

71387544740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569377246 (or 3569377244 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 50.

The spelling of 71387544740 in words is "seventy-one billion, three hundred eighty-seven million, five hundred forty-four thousand, seven hundred forty".