2251601033663 has 4 divisors (see below), whose sum is σ = 2294084072088. Its totient is φ = 2209117995240.

The previous prime is 2251601033609. The next prime is 2251601033683. The reversal of 2251601033663 is 3663301061522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2251601033663 - 2³² = 2247306066367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251601033683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21241519133 + ... + 21241519238.

It is an arithmetic number, because the mean of its divisors is an integer number (573521018022).

Almost surely, 2^{2251601033663} is an apocalyptic number.

2251601033663 is a deficient number, since it is larger than the sum of its proper divisors (42483038425).

2251601033663 is an equidigital number, since it uses as much as digits as its factorization.

2251601033663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42483038424.

The product of its (nonzero) digits is 116640, while the sum is 38.

The spelling of 2251601033663 in words is "two trillion, two hundred fifty-one billion, six hundred one million, thirty-three thousand, six hundred sixty-three".