71063403077 has 4 divisors (see below), whose sum is σ = 75243603276. Its totient is φ = 66883202880.

The previous prime is 71063403031. The next prime is 71063403097. The reversal of 71063403077 is 77030436017.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64613064481 + 6450338596 = 254191^2 + 80314^2 .

It is a cyclic number.

It is not a de Polignac number, because 71063403077 - 2¹⁸ = 71063140933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71063403077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71063403097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090100074 + ... + 2090100107.

It is an arithmetic number, because the mean of its divisors is an integer number (18810900819).

Almost surely, 2^71063403077 is an apocalyptic number.

It is an amenable number.

71063403077 is a deficient number, since it is larger than the sum of its proper divisors (4180200199).

71063403077 is a wasteful number, since it uses less digits than its factorization.

71063403077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180200198.

The product of its (nonzero) digits is 74088, while the sum is 38.

The spelling of 71063403077 in words is "seventy-one billion, sixty-three million, four hundred three thousand, seventy-seven".