2621247641 has 2 divisors, whose sum is σ = 2621247642. Its totient is φ = 2621247640.

The previous prime is 2621247613. The next prime is 2621247667. The reversal of 2621247641 is 1467421262.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1464975625 + 1156272016 = 38275^2 + 34004^2 .

It is a cyclic number.

It is not a de Polignac number, because 2621247641 - 2²² = 2617053337 is a prime.

It is not a weakly prime, because it can be changed into another prime (2621247841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310623820 + 1310623821.

It is an arithmetic number, because the mean of its divisors is an integer number (1310623821).

Almost surely, 2^2621247641 is an apocalyptic number.

It is an amenable number.

2621247641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621247641 is an equidigital number, since it uses as much as digits as its factorization.

2621247641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 2621247641 is about 51198.1214596786. The cubic root of 2621247641 is about 1378.8044748105.

The spelling of 2621247641 in words is "two billion, six hundred twenty-one million, two hundred forty-seven thousand, six hundred forty-one".