1643461442 has 8 divisors (see below), whose sum is σ = 2817362496. Its totient is φ = 704340612.

The previous prime is 1643461441. The next prime is 1643461447. The reversal of 1643461442 is 2441643461.

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

It is a super-2 number, since 2×1643461442² = 5401931022681438728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1643461441) 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, 58695038 + ... + 58695065.

It is an arithmetic number, because the mean of its divisors is an integer number (352170312).

Almost surely, 2^1643461442 is an apocalyptic number.

1643461442 is a deficient number, since it is larger than the sum of its proper divisors (1173901054).

1643461442 is a wasteful number, since it uses less digits than its factorization.

1643461442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117390112.

The product of its digits is 55296, while the sum is 35.

The square root of 1643461442 is about 40539.6280446676. The cubic root of 1643461442 is about 1180.1027972304.

The spelling of 1643461442 in words is "one billion, six hundred forty-three million, four hundred sixty-one thousand, four hundred forty-two".