7243072785 has 128 divisors (see below), whose sum is σ = 14831631360. Its totient is φ = 3322073088.

The previous prime is 7243072747. The next prime is 7243072789. The reversal of 7243072785 is 5872703427.

7243072785 is a `hidden beast` number, since 72 + 4 + 307 + 278 + 5 = 666.

It is not a de Polignac number, because 7243072785 - 2⁷ = 7243072657 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7243072785.

It is not an unprimeable number, because it can be changed into a prime (7243072789) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3071827 + ... + 3074183.

It is an arithmetic number, because the mean of its divisors is an integer number (115872120).

Almost surely, 2^7243072785 is an apocalyptic number.

It is an amenable number.

7243072785 is an abundant number, since it is smaller than the sum of its proper divisors (7588558575).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7243072785 is a wasteful number, since it uses less digits than its factorization.

7243072785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504 (or 2498 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 45.

The square root of 7243072785 is about 85106.2441011234. The cubic root of 7243072785 is about 1934.8217010162.

The spelling of 7243072785 in words is "seven billion, two hundred forty-three million, seventy-two thousand, seven hundred eighty-five".