71790207345 has 24 divisors (see below), whose sum is σ = 126476304552. Its totient is φ = 37660435200.

The previous prime is 71790207323. The next prime is 71790207353. The reversal of 71790207345 is 54370209717.

71790207345 is a `hidden beast` number, since 7 + 17 + 90 + 207 + 345 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 368179344 + 71422028001 = 19188^2 + 267249^2 .

It is not a de Polignac number, because 71790207345 - 2⁷ = 71790207217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 71790207345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13073796 + ... + 13079285.

It is an arithmetic number, because the mean of its divisors is an integer number (5269846023).

Almost surely, 2^71790207345 is an apocalyptic number.

It is an amenable number.

71790207345 is a deficient number, since it is larger than the sum of its proper divisors (54686097207).

71790207345 is a wasteful number, since it uses less digits than its factorization.

71790207345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26153153 (or 26153150 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 45.

The spelling of 71790207345 in words is "seventy-one billion, seven hundred ninety million, two hundred seven thousand, three hundred forty-five".