1601001651 has 16 divisors (see below), whose sum is σ = 2148042240. Its totient is φ = 1060668960.

The previous prime is 1601001643. The next prime is 1601001667. The reversal of 1601001651 is 1561001061.

It is not a de Polignac number, because 1601001651 - 2³ = 1601001643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1601002651) 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 15 ways as a sum of consecutive naturals, for example, 345516 + ... + 350118.

It is an arithmetic number, because the mean of its divisors is an integer number (134252640).

Almost surely, 2^1601001651 is an apocalyptic number.

1601001651 is a deficient number, since it is larger than the sum of its proper divisors (547040589).

1601001651 is a wasteful number, since it uses less digits than its factorization.

1601001651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1601001651 is about 40012.5186785336. The cubic root of 1601001651 is about 1169.8511148119.

The spelling of 1601001651 in words is "one billion, six hundred one million, one thousand, six hundred fifty-one".