1641016501 has 12 divisors (see below), whose sum is σ = 1678476492. Its totient is φ = 1604343104.

The previous prime is 1641016493. The next prime is 1641016523. The reversal of 1641016501 is 1056101461.

It can be written as a sum of positive squares in 2 ways, for example, as 822198276 + 818818225 = 28674^2 + 28615^2 .

It is not a de Polignac number, because 1641016501 - 2³ = 1641016493 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 (1641016541) 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 11 ways as a sum of consecutive naturals, for example, 684561 + ... + 686953.

It is an arithmetic number, because the mean of its divisors is an integer number (139873041).

Almost surely, 2^1641016501 is an apocalyptic number.

It is an amenable number.

1641016501 is a deficient number, since it is larger than the sum of its proper divisors (37459991).

1641016501 is an equidigital number, since it uses as much as digits as its factorization.

1641016501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708 (or 2649 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1641016501 is about 40509.4618700372. The cubic root of 1641016501 is about 1179.5173025720.

Adding to 1641016501 its reverse (1056101461), we get a palindrome (2697117962).

The spelling of 1641016501 in words is "one billion, six hundred forty-one million, sixteen thousand, five hundred one".