7258815812 has 12 divisors (see below), whose sum is σ = 12703857516. Its totient is φ = 3629142240.

The previous prime is 7258815793. The next prime is 7258815833. The reversal of 7258815812 is 2185188527.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2814726916 + 4444088896 = 53054^2 + 66664^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3158 + ... + 120530.

It is an arithmetic number, because the mean of its divisors is an integer number (1058654793).

Almost surely, 2^7258815812 is an apocalyptic number.

It is an amenable number.

7258815812 is a deficient number, since it is larger than the sum of its proper divisors (5445041704).

7258815812 is a wasteful number, since it uses less digits than its factorization.

7258815812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132838 (or 132836 counting only the distinct ones).

The product of its digits is 358400, while the sum is 47.

The square root of 7258815812 is about 85198.6843325647. The cubic root of 7258815812 is about 1936.2224834956. Note that the first 3 decimals are identical.

The spelling of 7258815812 in words is "seven billion, two hundred fifty-eight million, eight hundred fifteen thousand, eight hundred twelve".