71797120783 has 4 divisors (see below), whose sum is σ = 71808988248. Its totient is φ = 71785253320.

The previous prime is 71797120777. The next prime is 71797120817. The reversal of 71797120783 is 38702179717.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38702179717 = 1249 ⋅30986533.

It is a cyclic number.

It is not a de Polignac number, because 71797120783 - 2²¹ = 71795023631 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 71797120783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71797120753) 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, 5924653 + ... + 5936758.

It is an arithmetic number, because the mean of its divisors is an integer number (17952247062).

Almost surely, 2^71797120783 is an apocalyptic number.

71797120783 is a deficient number, since it is larger than the sum of its proper divisors (11867465).

71797120783 is a wasteful number, since it uses less digits than its factorization.

71797120783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11867464.

The product of its (nonzero) digits is 1037232, while the sum is 52.

The spelling of 71797120783 in words is "seventy-one billion, seven hundred ninety-seven million, one hundred twenty thousand, seven hundred eighty-three".