7998550825 has 6 divisors (see below), whose sum is σ = 9918203054. Its totient is φ = 6398840640.

The previous prime is 7998550753. The next prime is 7998550829. The reversal of 7998550825 is 5280558997.

It can be written as a sum of positive squares in 3 ways, for example, as 740873961 + 7257676864 = 27219^2 + 85192^2 .

It is not a de Polignac number, because 7998550825 - 2¹⁵ = 7998518057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7998550825.

It is not an unprimeable number, because it can be changed into a prime (7998550829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159970992 + ... + 159971041.

Almost surely, 2^7998550825 is an apocalyptic number.

It is an amenable number.

7998550825 is a deficient number, since it is larger than the sum of its proper divisors (1919652229).

7998550825 is a wasteful number, since it uses less digits than its factorization.

7998550825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319942043 (or 319942038 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 58.

The square root of 7998550825 is about 89434.6175985563. The cubic root of 7998550825 is about 1999.8792281239.

The spelling of 7998550825 in words is "seven billion, nine hundred ninety-eight million, five hundred fifty thousand, eight hundred twenty-five".