1641330557 has 8 divisors (see below), whose sum is σ = 1719566592. Its totient is φ = 1564675200.

The previous prime is 1641330541. The next prime is 1641330563. The reversal of 1641330557 is 7550331461.

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 1641330557 - 2⁴ = 1641330541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641330517) by changing a digit.

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, 393044 + ... + 397197.

It is an arithmetic number, because the mean of its divisors is an integer number (214945824).

Almost surely, 2^1641330557 is an apocalyptic number.

It is an amenable number.

1641330557 is a deficient number, since it is larger than the sum of its proper divisors (78236035).

1641330557 is an equidigital number, since it uses as much as digits as its factorization.

1641330557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790339.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 1641330557 is about 40513.3380135481. The cubic root of 1641330557 is about 1179.5925426965.

The spelling of 1641330557 in words is "one billion, six hundred forty-one million, three hundred thirty thousand, five hundred fifty-seven".