7443878659 has 48 divisors (see below), whose sum is σ = 9207406080. Its totient is φ = 5990591040.

The previous prime is 7443878657. The next prime is 7443878671. The reversal of 7443878659 is 9568783447.

It is a happy number.

It is not a de Polignac number, because 7443878659 - 2¹ = 7443878657 is a prime.

It is a super-2 number, since 2×7443878659² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7443878597 and 7443878606.

It is not an unprimeable number, because it can be changed into a prime (7443878657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15160404 + ... + 15160894.

It is an arithmetic number, because the mean of its divisors is an integer number (191820960).

Almost surely, 2^7443878659 is an apocalyptic number.

7443878659 is a deficient number, since it is larger than the sum of its proper divisors (1763527421).

7443878659 is a wasteful number, since it uses less digits than its factorization.

7443878659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 801 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 61.

The square root of 7443878659 is about 86277.9152448644. The cubic root of 7443878659 is about 1952.5392000471.

The spelling of 7443878659 in words is "seven billion, four hundred forty-three million, eight hundred seventy-eight thousand, six hundred fifty-nine".