1646141131 has 4 divisors (see below), whose sum is σ = 1650554752. Its totient is φ = 1641727512.

The previous prime is 1646141129. The next prime is 1646141149. The reversal of 1646141131 is 1311416461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1646141131 - 2¹ = 1646141129 is a prime.

It is a super-2 number, since 2×1646141131² = 5419561246339918322, which contains 22 as substring.

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 1646141131.

It is not an unprimeable number, because it can be changed into a prime (1646145131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2206251 + ... + 2206996.

It is an arithmetic number, because the mean of its divisors is an integer number (412638688).

Almost surely, 2^1646141131 is an apocalyptic number.

1646141131 is a deficient number, since it is larger than the sum of its proper divisors (4413621).

1646141131 is an equidigital number, since it uses as much as digits as its factorization.

1646141131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413620.

The product of its digits is 1728, while the sum is 28.

The square root of 1646141131 is about 40572.6648249779. The cubic root of 1646141131 is about 1180.7438408286.

Adding to 1646141131 its reverse (1311416461), we get a palindrome (2957557592).

The spelling of 1646141131 in words is "one billion, six hundred forty-six million, one hundred forty-one thousand, one hundred thirty-one".