1601643852 has 36 divisors (see below), whose sum is σ = 4050282600. Its totient is φ = 533659392.

The previous prime is 1601643851. The next prime is 1601643881. The reversal of 1601643852 is 2583461061.

It is a happy number.

1601643852 is a `hidden beast` number, since 1 + 6 + 0 + 1 + 643 + 8 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (1601643851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94524 + ... + 110172.

It is an arithmetic number, because the mean of its divisors is an integer number (112507850).

Almost surely, 2^1601643852 is an apocalyptic number.

1601643852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1601643852 is an abundant number, since it is smaller than the sum of its proper divisors (2448638748).

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

1601643852 is a wasteful number, since it uses less digits than its factorization.

1601643852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18502 (or 18497 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1601643852 is about 40020.5428748786. The cubic root of 1601643852 is about 1170.0075125531.

The spelling of 1601643852 in words is "one billion, six hundred one million, six hundred forty-three thousand, eight hundred fifty-two".