1609621632 has 160 divisors (see below), whose sum is σ = 5042941200. Its totient is φ = 508239360.

The previous prime is 1609621621. The next prime is 1609621661. The reversal of 1609621632 is 2361269061.

It is a happy number.

1609621632 is a `hidden beast` number, since 1 + 609 + 6 + 2 + 16 + 32 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 192907 + ... + 201077.

Almost surely, 2^1609621632 is an apocalyptic number.

1609621632 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 1609621632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2521470600).

1609621632 is an abundant number, since it is smaller than the sum of its proper divisors (3433319568).

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

1609621632 is an equidigital number, since it uses as much as digits as its factorization.

1609621632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8216 (or 8195 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1609621632 is about 40120.0901295099. The cubic root of 1609621632 is about 1171.9468966065.

The spelling of 1609621632 in words is "one billion, six hundred nine million, six hundred twenty-one thousand, six hundred thirty-two".