611412542661 has 4 divisors (see below), whose sum is σ = 815216723552. Its totient is φ = 407608361772.

The previous prime is 611412542627. The next prime is 611412542693. The reversal of 611412542661 is 166245214116.

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 not a de Polignac number, because 611412542661 - 2⁶ = 611412542597 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 (611412543661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101902090441 + ... + 101902090446.

It is an arithmetic number, because the mean of its divisors is an integer number (203804180888).

Almost surely, 2^611412542661 is an apocalyptic number.

It is an amenable number.

611412542661 is a deficient number, since it is larger than the sum of its proper divisors (203804180891).

611412542661 is a wasteful number, since it uses less digits than its factorization.

611412542661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203804180890.

The product of its digits is 69120, while the sum is 39.

Adding to 611412542661 its reverse (166245214116), we get a palindrome (777657756777).

The spelling of 611412542661 in words is "six hundred eleven billion, four hundred twelve million, five hundred forty-two thousand, six hundred sixty-one".