1601657512 has 96 divisors (see below), whose sum is σ = 3819100320. Its totient is φ = 624032640.

The previous prime is 1601657503. The next prime is 1601657513. The reversal of 1601657512 is 2157561061.

It is not an unprimeable number, because it can be changed into a prime (1601657513) 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 23 ways as a sum of consecutive naturals, for example, 339087 + ... + 343777.

It is an arithmetic number, because the mean of its divisors is an integer number (39782295).

Almost surely, 2^1601657512 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 1601657512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1909550160).

1601657512 is an abundant number, since it is smaller than the sum of its proper divisors (2217442808).

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

1601657512 is a wasteful number, since it uses less digits than its factorization.

1601657512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4791 (or 4780 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 1601657512 is about 40020.7135368674. The cubic root of 1601657512 is about 1170.0108387727.

The spelling of 1601657512 in words is "one billion, six hundred one million, six hundred fifty-seven thousand, five hundred twelve".