2051601669 has 64 divisors (see below), whose sum is σ = 3394406400. Its totient is φ = 1216166400.

The previous prime is 2051601661. The next prime is 2051601677. The reversal of 2051601669 is 9661061502.

It is an interprime number because it is at equal distance from previous prime (2051601661) and next prime (2051601677).

It is not a de Polignac number, because 2051601669 - 2³ = 2051601661 is a prime.

It is a super-2 number, since 2×2051601669² = 8418138816487171122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051601661) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4450099 + ... + 4450559.

It is an arithmetic number, because the mean of its divisors is an integer number (53037600).

Almost surely, 2^2051601669 is an apocalyptic number.

It is an amenable number.

2051601669 is a deficient number, since it is larger than the sum of its proper divisors (1342804731).

2051601669 is a wasteful number, since it uses less digits than its factorization.

2051601669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 2051601669 is about 45294.6097124150. The cubic root of 2051601669 is about 1270.6648448168.

The spelling of 2051601669 in words is "two billion, fifty-one million, six hundred one thousand, six hundred sixty-nine".