1643135298 has 16 divisors (see below), whose sum is σ = 3755737920. Its totient is φ = 469467216.

The previous prime is 1643135261. The next prime is 1643135353. The reversal of 1643135298 is 8925313461.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 39122269 = 1643135298 / (1 + 6 + 4 + 3 + 1 + 3 + 5 + 2 + 9 + 8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19561093 + ... + 19561176.

It is an arithmetic number, because the mean of its divisors is an integer number (234733620).

Almost surely, 2^1643135298 is an apocalyptic number.

1643135298 is an abundant number, since it is smaller than the sum of its proper divisors (2112602622).

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

1643135298 is a wasteful number, since it uses less digits than its factorization.

1643135298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39122281.

The product of its digits is 155520, while the sum is 42.

The square root of 1643135298 is about 40535.6053118737. The cubic root of 1643135298 is about 1180.0247284869.

The spelling of 1643135298 in words is "one billion, six hundred forty-three million, one hundred thirty-five thousand, two hundred ninety-eight".