2153167661 has 2 divisors, whose sum is σ = 2153167662. Its totient is φ = 2153167660.

The previous prime is 2153167633. The next prime is 2153167663. The reversal of 2153167661 is 1667613512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1813908100 + 339259561 = 42590^2 + 18419^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153167661 - 2¹⁴ = 2153151277 is a prime.

It is a super-2 number, since 2×2153167661² = 9272261952752421842, which contains 22 as substring.

Together with 2153167663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2153167663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076583830 + 1076583831.

It is an arithmetic number, because the mean of its divisors is an integer number (1076583831).

Almost surely, 2^2153167661 is an apocalyptic number.

It is an amenable number.

2153167661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153167661 is an equidigital number, since it uses as much as digits as its factorization.

2153167661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 2153167661 is about 46402.2376723364. The cubic root of 2153167661 is about 1291.2964273820.

The spelling of 2153167661 in words is "two billion, one hundred fifty-three million, one hundred sixty-seven thousand, six hundred sixty-one".