1649783744 has 168 divisors, whose sum is σ = 4034149920. Its totient is φ = 666107904.

The previous prime is 1649783743. The next prime is 1649783747. The reversal of 1649783744 is 4473879461.

Its product of digits (4064256) is a multiple of the sum of its prime divisors (378).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649783741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6419264 + ... + 6419520.

Almost surely, 2^1649783744 is an apocalyptic number.

1649783744 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1649783744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2017074960).

1649783744 is an abundant number, since it is smaller than the sum of its proper divisors (2384366176).

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

1649783744 is a wasteful number, since it uses less digits than its factorization.

1649783744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 378 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 53.

The square root of 1649783744 is about 40617.5300086059. The cubic root of 1649783744 is about 1181.6141235032.

The spelling of 1649783744 in words is "one billion, six hundred forty-nine million, seven hundred eighty-three thousand, seven hundred forty-four".