71541755720 has 32 divisors (see below), whose sum is σ = 160990598520. Its totient is φ = 28612853760.

The previous prime is 71541755671. The next prime is 71541755767. The reversal of 71541755720 is 2755714517.

It can be written as a sum of positive squares in 4 ways, for example, as 71525223364 + 16532356 = 267442^2 + 4066^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190814 + ... + 423666.

Almost surely, 2^71541755720 is an apocalyptic number.

It is an amenable number.

71541755720 is an abundant number, since it is smaller than the sum of its proper divisors (89448842800).

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

71541755720 is a wasteful number, since it uses less digits than its factorization.

71541755720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240545 (or 240541 counting only the distinct ones).

The product of its (nonzero) digits is 343000, while the sum is 44.

The spelling of 71541755720 in words is "seventy-one billion, five hundred forty-one million, seven hundred fifty-five thousand, seven hundred twenty".