7815825849 has 16 divisors (see below), whose sum is σ = 11461508352. Its totient is φ = 4707403008.

The previous prime is 7815825833. The next prime is 7815825917. The reversal of 7815825849 is 9485285187.

It is not a de Polignac number, because 7815825849 - 2⁴ = 7815825833 is a prime.

It is a super-2 number, since 2×7815825849² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7815825349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2130144 + ... + 2133809.

It is an arithmetic number, because the mean of its divisors is an integer number (716344272).

Almost surely, 2^7815825849 is an apocalyptic number.

It is an amenable number.

7815825849 is a deficient number, since it is larger than the sum of its proper divisors (3645682503).

7815825849 is a wasteful number, since it uses less digits than its factorization.

7815825849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264016.

The product of its digits is 6451200, while the sum is 57.

The square root of 7815825849 is about 88407.1594894893. The cubic root of 7815825849 is about 1984.5328460114.

The spelling of 7815825849 in words is "seven billion, eight hundred fifteen million, eight hundred twenty-five thousand, eight hundred forty-nine".