1601684172 has 192 divisors, whose sum is σ = 4868398080. Its totient is φ = 449971200.

The previous prime is 1601684153. The next prime is 1601684179. The reversal of 1601684172 is 2714861061.

It is a happy number.

1601684172 is a `hidden beast` number, since 1 + 601 + 6 + 8 + 41 + 7 + 2 = 666.

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 (1601684179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1433358 + ... + 1434474.

It is an arithmetic number, because the mean of its divisors is an integer number (25356240).

Almost surely, 2^1601684172 is an apocalyptic number.

1601684172 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 1601684172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2434199040).

1601684172 is an abundant number, since it is smaller than the sum of its proper divisors (3266713908).

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

1601684172 is a wasteful number, since it uses less digits than its factorization.

1601684172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229 (or 1221 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1601684172 is about 40021.0466130010. The cubic root of 1601684172 is about 1170.0173304468.

The spelling of 1601684172 in words is "one billion, six hundred one million, six hundred eighty-four thousand, one hundred seventy-two".