1649851382 has 4 divisors (see below), whose sum is σ = 2474777076. Its totient is φ = 824925690.

The previous prime is 1649851367. The next prime is 1649851393. The reversal of 1649851382 is 2831589461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2831589461 = 1493 ⋅1896577.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412462844 + ... + 412462847.

It is an arithmetic number, because the mean of its divisors is an integer number (618694269).

Almost surely, 2^1649851382 is an apocalyptic number.

1649851382 is a deficient number, since it is larger than the sum of its proper divisors (824925694).

1649851382 is an equidigital number, since it uses as much as digits as its factorization.

1649851382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824925693.

The product of its digits is 414720, while the sum is 47.

The square root of 1649851382 is about 40618.3626208640. The cubic root of 1649851382 is about 1181.6302712607.

The spelling of 1649851382 in words is "one billion, six hundred forty-nine million, eight hundred fifty-one thousand, three hundred eighty-two".