611621200613 has 4 divisors (see below), whose sum is σ = 611624299020. Its totient is φ = 611618102208.

The previous prime is 611621200579. The next prime is 611621200651. The reversal of 611621200613 is 316002126116.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 453584739169 + 158036461444 = 673487^2 + 397538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611621200613 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 (611621200693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1231370 + ... + 1655147.

It is an arithmetic number, because the mean of its divisors is an integer number (152906074755).

Almost surely, 2^611621200613 is an apocalyptic number.

It is an amenable number.

611621200613 is a deficient number, since it is larger than the sum of its proper divisors (3098407).

611621200613 is a wasteful number, since it uses less digits than its factorization.

611621200613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098406.

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

Adding to 611621200613 its reverse (316002126116), we get a palindrome (927623326729).

The spelling of 611621200613 in words is "six hundred eleven billion, six hundred twenty-one million, two hundred thousand, six hundred thirteen".