7816445825 has 6 divisors (see below), whose sum is σ = 9692392854. Its totient is φ = 6253156640.

The previous prime is 7816445809. The next prime is 7816445839. The reversal of 7816445825 is 5285446187.

It can be written as a sum of positive squares in 3 ways, for example, as 263445361 + 7553000464 = 16231^2 + 86908^2 .

It is not a de Polignac number, because 7816445825 - 2⁴ = 7816445809 is a prime.

It is a super-2 number, since 2×7816445825² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156328892 + ... + 156328941.

It is an arithmetic number, because the mean of its divisors is an integer number (1615398809).

Almost surely, 2^7816445825 is an apocalyptic number.

It is an amenable number.

7816445825 is a deficient number, since it is larger than the sum of its proper divisors (1875947029).

7816445825 is a wasteful number, since it uses less digits than its factorization.

7816445825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312657843 (or 312657838 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 50.

The square root of 7816445825 is about 88410.6657875621. The cubic root of 7816445825 is about 1984.5853177624.

The spelling of 7816445825 in words is "seven billion, eight hundred sixteen million, four hundred forty-five thousand, eight hundred twenty-five".