611404012031 has 4 divisors (see below), whose sum is σ = 611542311864. Its totient is φ = 611265712200.

The previous prime is 611404012007. The next prime is 611404012097. The reversal of 611404012031 is 130210404116.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611404012031 is a prime.

It is a super-2 number, since 2×611404012031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 611404011988 and 611404012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611404012931) 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, 69143285 + ... + 69152126.

It is an arithmetic number, because the mean of its divisors is an integer number (152885577966).

Almost surely, 2^611404012031 is an apocalyptic number.

611404012031 is a deficient number, since it is larger than the sum of its proper divisors (138299833).

611404012031 is a wasteful number, since it uses less digits than its factorization.

611404012031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138299832.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 611404012031 its reverse (130210404116), we get a palindrome (741614416147).

The spelling of 611404012031 in words is "six hundred eleven billion, four hundred four million, twelve thousand, thirty-one".