7245637785 has 32 divisors (see below), whose sum is σ = 12884705280. Its totient is φ = 3863268864.

The previous prime is 7245637771. The next prime is 7245637807. The reversal of 7245637785 is 5877365427.

It is a happy number.

7245637785 is a `hidden beast` number, since 7 + 2 + 4 + 563 + 7 + 78 + 5 = 666.

7245637785 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7245637785 - 2⁵ = 7245637753 is a prime.

It is a super-2 number, since 2×7245637785² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 824937 + ... + 833673.

It is an arithmetic number, because the mean of its divisors is an integer number (402647040).

Almost surely, 2^7245637785 is an apocalyptic number.

It is an amenable number.

7245637785 is a deficient number, since it is larger than the sum of its proper divisors (5639067495).

7245637785 is a wasteful number, since it uses less digits than its factorization.

7245637785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14894 (or 14888 counting only the distinct ones).

The product of its digits is 9878400, while the sum is 54.

The square root of 7245637785 is about 85121.3121668128. The cubic root of 7245637785 is about 1935.0500678109.

The spelling of 7245637785 in words is "seven billion, two hundred forty-five million, six hundred thirty-seven thousand, seven hundred eighty-five".