1643411490 has 48 divisors (see below), whose sum is σ = 4588140672. Its totient is φ = 375636576.

The previous prime is 1643411467. The next prime is 1643411503. The reversal of 1643411490 is 941143461.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 557514 + ... + 560453.

It is an arithmetic number, because the mean of its divisors is an integer number (95586264).

Almost surely, 2^1643411490 is an apocalyptic number.

1643411490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1643411490 is an abundant number, since it is smaller than the sum of its proper divisors (2944729182).

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

1643411490 is a wasteful number, since it uses less digits than its factorization.

1643411490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117991 (or 1117984 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1643411490 is about 40539.0119514524. The cubic root of 1643411490 is about 1180.0908409430.

The spelling of 1643411490 in words is "one billion, six hundred forty-three million, four hundred eleven thousand, four hundred ninety".