1646140798 has 4 divisors (see below), whose sum is σ = 2469211200. Its totient is φ = 823070398.

The previous prime is 1646140789. The next prime is 1646140813. The reversal of 1646140798 is 8970416461.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 411535198 + ... + 411535201.

It is an arithmetic number, because the mean of its divisors is an integer number (617302800).

Almost surely, 2^1646140798 is an apocalyptic number.

1646140798 is a deficient number, since it is larger than the sum of its proper divisors (823070402).

1646140798 is an equidigital number, since it uses as much as digits as its factorization.

1646140798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823070401.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 1646140798 is about 40572.6607212295. The cubic root of 1646140798 is about 1180.7437612106.

The spelling of 1646140798 in words is "one billion, six hundred forty-six million, one hundred forty thousand, seven hundred ninety-eight".