1646140794 has 8 divisors (see below), whose sum is σ = 3292281600. Its totient is φ = 548713596.

The previous prime is 1646140789. The next prime is 1646140813. The reversal of 1646140794 is 4970416461.

It is a sphenic number, since it is the product of 3 distinct primes.

1646140794 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137178394 + ... + 137178405.

It is an arithmetic number, because the mean of its divisors is an integer number (411535200).

Almost surely, 2^1646140794 is an apocalyptic number.

1646140794 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1646140794 is a wasteful number, since it uses less digits than its factorization.

1646140794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274356804.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 1646140794 is about 40572.6606719352. The cubic root of 1646140794 is about 1180.7437602542.

The spelling of 1646140794 in words is "one billion, six hundred forty-six million, one hundred forty thousand, seven hundred ninety-four".