1641780983 has 8 divisors (see below), whose sum is σ = 1687071408. Its totient is φ = 1596538944.

The previous prime is 1641780911. The next prime is 1641781003. The reversal of 1641780983 is 3890871461.

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

It is a cyclic number.

It is not a de Polignac number, because 1641780983 - 2⁸ = 1641780727 is a prime.

It is a super-2 number, since 2×1641780983² = 5390889592280892578, 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 (1641780583) 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, 63035 + ... + 85187.

It is an arithmetic number, because the mean of its divisors is an integer number (210883926).

Almost surely, 2^1641780983 is an apocalyptic number.

1641780983 is a deficient number, since it is larger than the sum of its proper divisors (45290425).

1641780983 is a wasteful number, since it uses less digits than its factorization.

1641780983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24193.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 1641780983 is about 40518.8966162703. The cubic root of 1641780983 is about 1179.7004369804.

The spelling of 1641780983 in words is "one billion, six hundred forty-one million, seven hundred eighty thousand, nine hundred eighty-three".