1641796406 has 4 divisors (see below), whose sum is σ = 2462694612. Its totient is φ = 820898202.

The previous prime is 1641796349. The next prime is 1641796411. The reversal of 1641796406 is 6046971461.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410449100 + ... + 410449103.

It is an arithmetic number, because the mean of its divisors is an integer number (615673653).

Almost surely, 2^1641796406 is an apocalyptic number.

1641796406 is a deficient number, since it is larger than the sum of its proper divisors (820898206).

1641796406 is an equidigital number, since it uses as much as digits as its factorization.

1641796406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820898205.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1641796406 is about 40519.0869344313. The cubic root of 1641796406 is about 1179.7041310303.

The spelling of 1641796406 in words is "one billion, six hundred forty-one million, seven hundred ninety-six thousand, four hundred six".