7256188385 has 4 divisors (see below), whose sum is σ = 8707426068. Its totient is φ = 5804950704.

The previous prime is 7256188351. The next prime is 7256188391. The reversal of 7256188385 is 5838816527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2902300129 + 4353888256 = 53873^2 + 65984^2 .

It is a cyclic number.

It is not a de Polignac number, because 7256188385 - 2⁸ = 7256188129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 725618834 + ... + 725618843.

It is an arithmetic number, because the mean of its divisors is an integer number (2176856517).

Almost surely, 2^7256188385 is an apocalyptic number.

It is an amenable number.

7256188385 is a deficient number, since it is larger than the sum of its proper divisors (1451237683).

7256188385 is a wasteful number, since it uses less digits than its factorization.

7256188385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451237682.

The product of its digits is 3225600, while the sum is 53.

The square root of 7256188385 is about 85183.2635263524. The cubic root of 7256188385 is about 1935.9888412923.

The spelling of 7256188385 in words is "seven billion, two hundred fifty-six million, one hundred eighty-eight thousand, three hundred eighty-five".