1649435456 has 28 divisors (see below), whose sum is σ = 3286170720. Its totient is φ = 821424000.

The previous prime is 1649435399. The next prime is 1649435471. The reversal of 1649435456 is 6545349461.

It is a self number, because there is not a number n which added to its sum of digits gives 1649435456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35276 + ... + 67403.

It is an arithmetic number, because the mean of its divisors is an integer number (117363240).

Almost surely, 2^1649435456 is an apocalyptic number.

1649435456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1649435456 is a deficient number, since it is larger than the sum of its proper divisors (1636735264).

1649435456 is a wasteful number, since it uses less digits than its factorization.

1649435456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102942 (or 102932 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 47.

The square root of 1649435456 is about 40613.2423724085. The cubic root of 1649435456 is about 1181.5309669510.

The spelling of 1649435456 in words is "one billion, six hundred forty-nine million, four hundred thirty-five thousand, four hundred fifty-six".