1651816998 has 24 divisors (see below), whose sum is σ = 3854240208. Its totient is φ = 508251312.

The previous prime is 1651816981. The next prime is 1651817023. The reversal of 1651816998 is 8996181561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3529290 + ... + 3529757.

It is an arithmetic number, because the mean of its divisors is an integer number (160593342).

Almost surely, 2^1651816998 is an apocalyptic number.

1651816998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1651816998 is an abundant number, since it is smaller than the sum of its proper divisors (2202423210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1651816998 is a wasteful number, since it uses less digits than its factorization.

1651816998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7059068 (or 7059065 counting only the distinct ones).

The product of its digits is 933120, while the sum is 54.

The square root of 1651816998 is about 40642.5515685224. The cubic root of 1651816998 is about 1182.0993457516.

The spelling of 1651816998 in words is "one billion, six hundred fifty-one million, eight hundred sixteen thousand, nine hundred ninety-eight".