71045168077 has 16 divisors (see below), whose sum is σ = 76724550000. Its totient is φ = 65396588544.

The previous prime is 71045168059. The next prime is 71045168111. The reversal of 71045168077 is 77086154017.

It can be written as a sum of positive squares in 8 ways, for example, as 31819781161 + 39225386916 = 178381^2 + 198054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71045168077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71045168017) 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, 20130049 + ... + 20133577.

It is an arithmetic number, because the mean of its divisors is an integer number (4795284375).

Almost surely, 2^71045168077 is an apocalyptic number.

It is an amenable number.

71045168077 is a deficient number, since it is larger than the sum of its proper divisors (5679381923).

71045168077 is a wasteful number, since it uses less digits than its factorization.

71045168077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7440.

The product of its (nonzero) digits is 329280, while the sum is 46.

The spelling of 71045168077 in words is "seventy-one billion, forty-five million, one hundred sixty-eight thousand, seventy-seven".