7257343985 has 8 divisors (see below), whose sum is σ = 9087456960. Its totient is φ = 5553445744.

The previous prime is 7257343981. The next prime is 7257343993. The reversal of 7257343985 is 5893437527.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7257343985 - 2² = 7257343981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7257343981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31553555 + ... + 31553784.

It is an arithmetic number, because the mean of its divisors is an integer number (1135932120).

Almost surely, 2^7257343985 is an apocalyptic number.

It is an amenable number.

7257343985 is a deficient number, since it is larger than the sum of its proper divisors (1830112975).

7257343985 is a wasteful number, since it uses less digits than its factorization.

7257343985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63107367.

The product of its digits is 6350400, while the sum is 53.

The square root of 7257343985 is about 85190.0462788934. The cubic root of 7257343985 is about 1936.0916092026.

The spelling of 7257343985 in words is "seven billion, two hundred fifty-seven million, three hundred forty-three thousand, nine hundred eighty-five".