1641540535 has 8 divisors (see below), whose sum is σ = 1999249776. Its totient is φ = 1293631680.

The previous prime is 1641540497. The next prime is 1641540541. The reversal of 1641540535 is 5350451461.

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

It is not a de Polignac number, because 1641540535 - 2²¹ = 1639443383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1641540535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2449726 + ... + 2450395.

It is an arithmetic number, because the mean of its divisors is an integer number (249906222).

Almost surely, 2^1641540535 is an apocalyptic number.

1641540535 is a deficient number, since it is larger than the sum of its proper divisors (357709241).

1641540535 is an equidigital number, since it uses as much as digits as its factorization.

1641540535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4900193.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 1641540535 is about 40515.9293982009. The cubic root of 1641540535 is about 1179.6428429280.

Adding to 1641540535 its reverse (5350451461), we get a palindrome (6991991996).

It can be divided in two parts, 16415 and 40535, that multiplied together give a square (665382025 = 25795²).

The spelling of 1641540535 in words is "one billion, six hundred forty-one million, five hundred forty thousand, five hundred thirty-five".