71758073491 has 4 divisors (see below), whose sum is σ = 77277925312. Its totient is φ = 66238221672.

The previous prime is 71758073479. The next prime is 71758073531. The reversal of 71758073491 is 19437085717.

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

It is a cyclic number.

It is not a de Polignac number, because 71758073491 - 2⁵ = 71758073459 is a prime.

It is a super-2 number, since 2×71758073491² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71758073291) 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, 2759925891 + ... + 2759925916.

It is an arithmetic number, because the mean of its divisors is an integer number (19319481328).

Almost surely, 2^71758073491 is an apocalyptic number.

71758073491 is a deficient number, since it is larger than the sum of its proper divisors (5519851821).

71758073491 is a wasteful number, since it uses less digits than its factorization.

71758073491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5519851820.

The product of its (nonzero) digits is 1481760, while the sum is 52.

The spelling of 71758073491 in words is "seventy-one billion, seven hundred fifty-eight million, seventy-three thousand, four hundred ninety-one".