1098815851 has 16 divisors (see below), whose sum is σ = 1288570624. Its totient is φ = 917378784.

The previous prime is 1098815843. The next prime is 1098815857. The reversal of 1098815851 is 1585188901.

It is a happy number.

It is not a de Polignac number, because 1098815851 - 2³ = 1098815843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098815857) 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, 107380 + ... + 117166.

It is an arithmetic number, because the mean of its divisors is an integer number (80535664).

Almost surely, 2^1098815851 is an apocalyptic number.

1098815851 is a deficient number, since it is larger than the sum of its proper divisors (189754773).

1098815851 is an equidigital number, since it uses as much as digits as its factorization.

1098815851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10210.

The product of its (nonzero) digits is 115200, while the sum is 46.

The square root of 1098815851 is about 33148.3913787683. The cubic root of 1098815851 is about 1031.9095662573.

The spelling of 1098815851 in words is "one billion, ninety-eight million, eight hundred fifteen thousand, eight hundred fifty-one".