1601651051 has 16 divisors (see below), whose sum is σ = 2150469888. Its totient is φ = 1152036000.

The previous prime is 1601651041. The next prime is 1601651089. The reversal of 1601651051 is 1501561061.

It is a cyclic number.

It is not a de Polignac number, because 1601651051 - 2¹⁸ = 1601388907 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1601651051.

It is not an unprimeable number, because it can be changed into a prime (1601651011) 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, 799025 + ... + 801026.

It is an arithmetic number, because the mean of its divisors is an integer number (134404368).

Almost surely, 2^1601651051 is an apocalyptic number.

1601651051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1601651051 is a deficient number, since it is larger than the sum of its proper divisors (548818837).

1601651051 is a wasteful number, since it uses less digits than its factorization.

1601651051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600082.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 1601651051 is about 40020.6328160863. The cubic root of 1601651051 is about 1170.0092655170.

The spelling of 1601651051 in words is "one billion, six hundred one million, six hundred fifty-one thousand, fifty-one".