1649254464 has 168 divisors, whose sum is σ = 5554016832. Its totient is φ = 461306880.

The previous prime is 1649254457. The next prime is 1649254517. The reversal of 1649254464 is 4644529461.

1649254464 is a `hidden beast` number, since 1 + 6 + 49 + 2 + 544 + 64 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72357 + ... + 92379.

It is an arithmetic number, because the mean of its divisors is an integer number (33059624).

Almost surely, 2^1649254464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1649254464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2777008416).

1649254464 is an abundant number, since it is smaller than the sum of its proper divisors (3904762368).

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

1649254464 is a wasteful number, since it uses less digits than its factorization.

1649254464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20065 (or 20052 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 1649254464 is about 40611.0140725395. The cubic root of 1649254464 is about 1181.4877490379.

The spelling of 1649254464 in words is "one billion, six hundred forty-nine million, two hundred fifty-four thousand, four hundred sixty-four".