7427985841 has 4 divisors (see below), whose sum is σ = 7428243312. Its totient is φ = 7427728372.

The previous prime is 7427985839. The next prime is 7427985871. The reversal of 7427985841 is 1485897247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1485897247 = 28603 ⋅51949.

It is a cyclic number.

It is not a de Polignac number, because 7427985841 - 2¹ = 7427985839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7427985811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79075 + ... + 145288.

It is an arithmetic number, because the mean of its divisors is an integer number (1857060828).

Almost surely, 2^7427985841 is an apocalyptic number.

It is an amenable number.

7427985841 is a deficient number, since it is larger than the sum of its proper divisors (257471).

7427985841 is a wasteful number, since it uses less digits than its factorization.

7427985841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257470.

The product of its digits is 4515840, while the sum is 55.

The square root of 7427985841 is about 86185.7635633635. The cubic root of 7427985841 is about 1951.1486409060.

The spelling of 7427985841 in words is "seven billion, four hundred twenty-seven million, nine hundred eighty-five thousand, eight hundred forty-one".