1643405152 has 48 divisors (see below), whose sum is σ = 3414398400. Its totient is φ = 776476800.

The previous prime is 1643405143. The next prime is 1643405167. The reversal of 1643405152 is 2515043461.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251527 + ... + 257977.

It is an arithmetic number, because the mean of its divisors is an integer number (71133300).

Almost surely, 2^1643405152 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 1643405152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1707199200).

1643405152 is an abundant number, since it is smaller than the sum of its proper divisors (1770993248).

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

1643405152 is a wasteful number, since it uses less digits than its factorization.

1643405152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6899 (or 6891 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1643405152 is about 40538.9337797629. The cubic root of 1643405152 is about 1180.0893238903.

The spelling of 1643405152 in words is "one billion, six hundred forty-three million, four hundred five thousand, one hundred fifty-two".