2201778901 has 8 divisors (see below), whose sum is σ = 2548171520. Its totient is φ = 1863349488.

The previous prime is 2201778899. The next prime is 2201778949. The reversal of 2201778901 is 1098771022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2201778901 - 2¹ = 2201778899 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 (2201778961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1990206 + ... + 1991311.

It is an arithmetic number, because the mean of its divisors is an integer number (318521440).

Almost surely, 2^2201778901 is an apocalyptic number.

It is an amenable number.

2201778901 is a deficient number, since it is larger than the sum of its proper divisors (346392619).

2201778901 is an equidigital number, since it uses as much as digits as its factorization.

2201778901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981603.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 2201778901 is about 46923.1169148001. The cubic root of 2201778901 is about 1300.9419014140.

The spelling of 2201778901 in words is "two billion, two hundred one million, seven hundred seventy-eight thousand, nine hundred one".