1650644352 has 384 divisors, whose sum is σ = 5834073600. Its totient is φ = 449971200.

The previous prime is 1650644339. The next prime is 1650644447. The reversal of 1650644352 is 2534460561.

1650644352 is a `hidden beast` number, since 1 + 6 + 5 + 0 + 644 + 3 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23248477 + ... + 23248547.

It is an arithmetic number, because the mean of its divisors is an integer number (15192900).

Almost surely, 2^1650644352 is an apocalyptic number.

1650644352 is a gapful number since it is divisible by the number (12) 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 1650644352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2917036800).

1650644352 is an abundant number, since it is smaller than the sum of its proper divisors (4183429248).

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

1650644352 is an equidigital number, since it uses as much as digits as its factorization.

1650644352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 1650644352 is about 40628.1226738327. The cubic root of 1650644352 is about 1181.8195503861.

The spelling of 1650644352 in words is "one billion, six hundred fifty million, six hundred forty-four thousand, three hundred fifty-two".