611623123621 has 4 divisors (see below), whose sum is σ = 612944124352. Its totient is φ = 610302122892.

The previous prime is 611623123597. The next prime is 611623123627. The reversal of 611623123621 is 126321326116.

611623123621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 611623123621 - 2²³ = 611614735013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611623123627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660499671 + ... + 660500596.

It is an arithmetic number, because the mean of its divisors is an integer number (153236031088).

Almost surely, 2^611623123621 is an apocalyptic number.

It is an amenable number.

611623123621 is a deficient number, since it is larger than the sum of its proper divisors (1321000731).

611623123621 is a wasteful number, since it uses less digits than its factorization.

611623123621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321000730.

The product of its digits is 15552, while the sum is 34.

Adding to 611623123621 its reverse (126321326116), we get a palindrome (737944449737).

The spelling of 611623123621 in words is "six hundred eleven billion, six hundred twenty-three million, one hundred twenty-three thousand, six hundred twenty-one".