1641996831 has 8 divisors (see below), whose sum is σ = 2190052480. Its totient is φ = 1094302872.

The previous prime is 1641996817. The next prime is 1641996857. The reversal of 1641996831 is 1386991461.

It is a happy number.

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

It is not a de Polignac number, because 1641996831 - 2¹⁷ = 1641865759 is a prime.

It is a super-2 number, since 2×1641996831² = 5392307186028085122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641994831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79645 + ... + 98118.

It is an arithmetic number, because the mean of its divisors is an integer number (273756560).

Almost surely, 2^1641996831 is an apocalyptic number.

1641996831 is a deficient number, since it is larger than the sum of its proper divisors (548055649).

1641996831 is a wasteful number, since it uses less digits than its factorization.

1641996831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180845.

The product of its digits is 279936, while the sum is 48.

The square root of 1641996831 is about 40521.5600760879. The cubic root of 1641996831 is about 1179.7521338519.

The spelling of 1641996831 in words is "one billion, six hundred forty-one million, nine hundred ninety-six thousand, eight hundred thirty-one".