2355630661 has 4 divisors (see below), whose sum is σ = 2355791692. Its totient is φ = 2355469632.

The previous prime is 2355630643. The next prime is 2355630709. The reversal of 2355630661 is 1660365532.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1943134561 + 412496100 = 44081^2 + 20310^2 .

It is a cyclic number.

It is not a de Polignac number, because 2355630661 - 2⁷ = 2355630533 is a prime.

It is a super-2 number, since 2×2355630661² = 11097991622086593842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2355630661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2355630161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56106 + ... + 88651.

It is an arithmetic number, because the mean of its divisors is an integer number (588947923).

Almost surely, 2^2355630661 is an apocalyptic number.

It is an amenable number.

2355630661 is a deficient number, since it is larger than the sum of its proper divisors (161031).

2355630661 is a wasteful number, since it uses less digits than its factorization.

2355630661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161030.

The product of its (nonzero) digits is 97200, while the sum is 37.

The square root of 2355630661 is about 48534.8396618347. The cubic root of 2355630661 is about 1330.5638894445.

The spelling of 2355630661 in words is "two billion, three hundred fifty-five million, six hundred thirty thousand, six hundred sixty-one".