611403113621 has 2 divisors, whose sum is σ = 611403113622. Its totient is φ = 611403113620.

The previous prime is 611403113611. The next prime is 611403113627. The reversal of 611403113621 is 126311304116.

611403113621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583283512900 + 28119600721 = 763730^2 + 167689^2 .

It is a cyclic number.

It is not a de Polignac number, because 611403113621 - 2⁶ = 611403113557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611403113627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305701556810 + 305701556811.

It is an arithmetic number, because the mean of its divisors is an integer number (305701556811).

Almost surely, 2^611403113621 is an apocalyptic number.

It is an amenable number.

611403113621 is a deficient number, since it is larger than the sum of its proper divisors (1).

611403113621 is an equidigital number, since it uses as much as digits as its factorization.

611403113621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 611403113621 its reverse (126311304116), we get a palindrome (737714417737).

The spelling of 611403113621 in words is "six hundred eleven billion, four hundred three million, one hundred thirteen thousand, six hundred twenty-one".