71045758507 has 4 divisors (see below), whose sum is σ = 71067575016. Its totient is φ = 71023942000.

The previous prime is 71045758481. The next prime is 71045758513. The reversal of 71045758507 is 70585754017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70585754017 = 31 ⋅2276959807.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71045758507 is a prime.

It is a super-4 number, since 4×71045758507⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71045758517) 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, 10903369 + ... + 10909882.

It is an arithmetic number, because the mean of its divisors is an integer number (17766893754).

Almost surely, 2^71045758507 is an apocalyptic number.

71045758507 is a deficient number, since it is larger than the sum of its proper divisors (21816509).

71045758507 is a wasteful number, since it uses less digits than its factorization.

71045758507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21816508.

The product of its (nonzero) digits is 1372000, while the sum is 49.

The spelling of 71045758507 in words is "seventy-one billion, forty-five million, seven hundred fifty-eight thousand, five hundred seven".