1641797405 has 8 divisors (see below), whose sum is σ = 2015974752. Its totient is φ = 1282892688.

The previous prime is 1641797393. The next prime is 1641797419. The reversal of 1641797405 is 5047971461.

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

It is a cyclic number.

It is not a de Polignac number, because 1641797405 - 2⁸ = 1641797149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3817919 + ... + 3818348.

It is an arithmetic number, because the mean of its divisors is an integer number (251996844).

Almost surely, 2^1641797405 is an apocalyptic number.

It is an amenable number.

1641797405 is a deficient number, since it is larger than the sum of its proper divisors (374177347).

1641797405 is an equidigital number, since it uses as much as digits as its factorization.

1641797405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7636315.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 1641797405 is about 40519.0992619530. The cubic root of 1641797405 is about 1179.7043703056.

The spelling of 1641797405 in words is "one billion, six hundred forty-one million, seven hundred ninety-seven thousand, four hundred five".