1643049354 has 32 divisors (see below), whose sum is σ = 3481790400. Its totient is φ = 515112192.

The previous prime is 1643049349. The next prime is 1643049379. The reversal of 1643049354 is 4539403461.

It is a super-2 number, since 2×1643049354² = 5399222359359634632, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171072 + ... + 180420.

It is an arithmetic number, because the mean of its divisors is an integer number (108805950).

Almost surely, 2^1643049354 is an apocalyptic number.

1643049354 is an abundant number, since it is smaller than the sum of its proper divisors (1838741046).

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

1643049354 is a wasteful number, since it uses less digits than its factorization.

1643049354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11094.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 1643049354 is about 40534.5451929586. The cubic root of 1643049354 is about 1180.0041544429.

The spelling of 1643049354 in words is "one billion, six hundred forty-three million, forty-nine thousand, three hundred fifty-four".