71440843920790 has 32 divisors (see below), whose sum is σ = 135883080161280. Its totient is φ = 26987889518304.

The previous prime is 71440843920781. The next prime is 71440843920799. The reversal of 71440843920790 is 9702934804417.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71440843920781) and next prime (71440843920799).

It is a super-2 number, since 2×71440843920790² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71440843920799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1965882874 + ... + 1965919213.

It is an arithmetic number, because the mean of its divisors is an integer number (4246346255040).

Almost surely, 2^{71440843920790} is an apocalyptic number.

71440843920790 is a deficient number, since it is larger than the sum of its proper divisors (64442236240490).

71440843920790 is a wasteful number, since it uses less digits than its factorization.

71440843920790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931802196.

The product of its (nonzero) digits is 12192768, while the sum is 58.

The spelling of 71440843920790 in words is "seventy-one trillion, four hundred forty billion, eight hundred forty-three million, nine hundred twenty thousand, seven hundred ninety".