1641263487 has 8 divisors (see below), whose sum is σ = 2317077936. Its totient is φ = 1029812352.

The previous prime is 1641263461. The next prime is 1641263527. The reversal of 1641263487 is 7843621461.

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

It is not a de Polignac number, because 1641263487 - 2¹⁰ = 1641262463 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641263447) 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, 16090768 + ... + 16090869.

It is an arithmetic number, because the mean of its divisors is an integer number (289634742).

Almost surely, 2^1641263487 is an apocalyptic number.

1641263487 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1641263487 is a deficient number, since it is larger than the sum of its proper divisors (675814449).

1641263487 is a wasteful number, since it uses less digits than its factorization.

1641263487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32181657.

The product of its digits is 193536, while the sum is 42.

The square root of 1641263487 is about 40512.5102530070. The cubic root of 1641263487 is about 1179.5764751735.

The spelling of 1641263487 in words is "one billion, six hundred forty-one million, two hundred sixty-three thousand, four hundred eighty-seven".