1098616825 has 6 divisors (see below), whose sum is σ = 1362284894. Its totient is φ = 878893440.

The previous prime is 1098616819. The next prime is 1098616861. The reversal of 1098616825 is 5286168901.

It can be written as a sum of positive squares in 3 ways, for example, as 6446521 + 1092170304 = 2539^2 + 33048^2 .

It is not a de Polignac number, because 1098616825 - 2⁵ = 1098616793 is a prime.

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, 21972312 + ... + 21972361.

Almost surely, 2^1098616825 is an apocalyptic number.

It is an amenable number.

1098616825 is a deficient number, since it is larger than the sum of its proper divisors (263668069).

1098616825 is an equidigital number, since it uses as much as digits as its factorization.

1098616825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43944683 (or 43944678 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 1098616825 is about 33145.3891966892. The cubic root of 1098616825 is about 1031.8472600228.

The spelling of 1098616825 in words is "one billion, ninety-eight million, six hundred sixteen thousand, eight hundred twenty-five".