1641613143 has 16 divisors (see below), whose sum is σ = 2320625376. Its totient is φ = 1028674560.

The previous prime is 1641613111. The next prime is 1641613147. The reversal of 1641613143 is 3413161461.

It is not a de Polignac number, because 1641613143 - 2⁵ = 1641613111 is a prime.

It is a super-2 number, since 2×1641613143² = 5389787422540676898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1641613143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641613147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18603 + ... + 60243.

It is an arithmetic number, because the mean of its divisors is an integer number (145039086).

Almost surely, 2^1641613143 is an apocalyptic number.

1641613143 is a deficient number, since it is larger than the sum of its proper divisors (679012233).

1641613143 is a wasteful number, since it uses less digits than its factorization.

1641613143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42434.

The product of its digits is 5184, while the sum is 30.

The square root of 1641613143 is about 40516.8254309244. The cubic root of 1641613143 is about 1179.6602351769.

The spelling of 1641613143 in words is "one billion, six hundred forty-one million, six hundred thirteen thousand, one hundred forty-three".