1649881419 has 8 divisors (see below), whose sum is σ = 2200067472. Its totient is φ = 1099808160.

The previous prime is 1649881403. The next prime is 1649881423. The reversal of 1649881419 is 9141889461.

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

It is not a de Polignac number, because 1649881419 - 2⁴ = 1649881403 is a prime.

It is a super-2 number, since 2×1649881419² = 5444217393522907122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1649881469) 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, 15697 + ... + 59549.

It is an arithmetic number, because the mean of its divisors is an integer number (275008434).

Almost surely, 2^1649881419 is an apocalyptic number.

1649881419 is a deficient number, since it is larger than the sum of its proper divisors (550186053).

1649881419 is a wasteful number, since it uses less digits than its factorization.

1649881419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56397.

The product of its digits is 497664, while the sum is 51.

The square root of 1649881419 is about 40618.7323657447. The cubic root of 1649881419 is about 1181.6374420911.

The spelling of 1649881419 in words is "one billion, six hundred forty-nine million, eight hundred eighty-one thousand, four hundred nineteen".