71442793643 has 4 divisors (see below), whose sum is σ = 76938393168. Its totient is φ = 65947194120.

The previous prime is 71442793619. The next prime is 71442793783. The reversal of 71442793643 is 34639724417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34639724417 = 97 ⋅357110561.

It is a cyclic number.

It is not a de Polignac number, because 71442793643 - 2¹² = 71442789547 is a prime.

It is a super-2 number, since 2×71442793643² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71442793591 and 71442793600.

It is not an unprimeable number, because it can be changed into a prime (71442793943) 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, 2747799743 + ... + 2747799768.

It is an arithmetic number, because the mean of its divisors is an integer number (19234598292).

Almost surely, 2^71442793643 is an apocalyptic number.

71442793643 is a deficient number, since it is larger than the sum of its proper divisors (5495599525).

71442793643 is a wasteful number, since it uses less digits than its factorization.

71442793643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5495599524.

The product of its digits is 3048192, while the sum is 50.

The spelling of 71442793643 in words is "seventy-one billion, four hundred forty-two million, seven hundred ninety-three thousand, six hundred forty-three".