1641335836 has 48 divisors (see below), whose sum is σ = 3406357696. Its totient is φ = 677320704.

The previous prime is 1641335831. The next prime is 1641335887. The reversal of 1641335836 is 6385331461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641335831) 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, 92326 + ... + 108658.

Almost surely, 2^1641335836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641335836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1703178848).

1641335836 is an abundant number, since it is smaller than the sum of its proper divisors (1765021860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1641335836 is a wasteful number, since it uses less digits than its factorization.

1641335836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16478 (or 16476 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The square root of 1641335836 is about 40513.4031648787. The cubic root of 1641335836 is about 1179.5938073335.

The spelling of 1641335836 in words is "one billion, six hundred forty-one million, three hundred thirty-five thousand, eight hundred thirty-six".