2291363661 has 32 divisors (see below), whose sum is σ = 3283568640. Its totient is φ = 1417800384.

The previous prime is 2291363629. The next prime is 2291363663. The reversal of 2291363661 is 1663631922.

2291363661 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2291363661 - 2⁵ = 2291363629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291363663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 463360 + ... + 468278.

It is an arithmetic number, because the mean of its divisors is an integer number (102611520).

Almost surely, 2^2291363661 is an apocalyptic number.

It is an amenable number.

2291363661 is a deficient number, since it is larger than the sum of its proper divisors (992204979).

2291363661 is a wasteful number, since it uses less digits than its factorization.

2291363661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5145.

The product of its digits is 69984, while the sum is 39.

The square root of 2291363661 is about 47868.1904922256. The cubic root of 2291363661 is about 1318.3518726728.

The spelling of 2291363661 in words is "two billion, two hundred ninety-one million, three hundred sixty-three thousand, six hundred sixty-one".