1601636652 has 240 divisors, whose sum is σ = 5345125632. Its totient is φ = 406062720.

The previous prime is 1601636633. The next prime is 1601636693. The reversal of 1601636652 is 2566361061.

1601636652 is a `hidden beast` number, since 16 + 0 + 1 + 636 + 6 + 5 + 2 = 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1072018 + ... + 1073510.

Almost surely, 2^1601636652 is an apocalyptic number.

1601636652 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 1601636652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2672562816).

1601636652 is an abundant number, since it is smaller than the sum of its proper divisors (3743488980).

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

1601636652 is a wasteful number, since it uses less digits than its factorization.

1601636652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570 (or 1559 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1601636652 is about 40020.4529209753. The cubic root of 1601636652 is about 1170.0057593405.

The spelling of 1601636652 in words is "one billion, six hundred one million, six hundred thirty-six thousand, six hundred fifty-two".