1153644671 has 2 divisors, whose sum is σ = 1153644672. Its totient is φ = 1153644670.

The previous prime is 1153644643. The next prime is 1153644673. The reversal of 1153644671 is 1764463511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1153644671 is a prime.

Together with 1153644673, 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 (1153644673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576822335 + 576822336.

It is an arithmetic number, because the mean of its divisors is an integer number (576822336).

Almost surely, 2^1153644671 is an apocalyptic number.

1153644671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153644671 is an equidigital number, since it uses as much as digits as its factorization.

1153644671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 1153644671 is about 33965.3451476648. The cubic root of 1153644671 is about 1048.7951928447.

The spelling of 1153644671 in words is "one billion, one hundred fifty-three million, six hundred forty-four thousand, six hundred seventy-one".