1652111621 has 2 divisors, whose sum is σ = 1652111622. Its totient is φ = 1652111620.

The previous prime is 1652111611. The next prime is 1652111623. The reversal of 1652111621 is 1261112561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1645194721 + 6916900 = 40561^2 + 2630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1652111621 is a prime.

Together with 1652111623, 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 (1652111623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 826055810 + 826055811.

It is an arithmetic number, because the mean of its divisors is an integer number (826055811).

Almost surely, 2^1652111621 is an apocalyptic number.

It is an amenable number.

1652111621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1652111621 is an equidigital number, since it uses as much as digits as its factorization.

1652111621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 26.

The square root of 1652111621 is about 40646.1759701943. The cubic root of 1652111621 is about 1182.1696224936.

The spelling of 1652111621 in words is "one billion, six hundred fifty-two million, one hundred eleven thousand, six hundred twenty-one".