611413552531 has 4 divisors (see below), whose sum is σ = 611415250600. Its totient is φ = 611411854464.

The previous prime is 611413552517. The next prime is 611413552543. The reversal of 611413552531 is 135255314116.

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

It is a cyclic number.

It is not a de Polignac number, because 611413552531 - 2¹⁵ = 611413519763 is a prime.

It is a super-2 number, since 2×611413552531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611413582531) 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, 71721 + ... + 1108138.

It is an arithmetic number, because the mean of its divisors is an integer number (152853812650).

Almost surely, 2^611413552531 is an apocalyptic number.

611413552531 is a deficient number, since it is larger than the sum of its proper divisors (1698069).

611413552531 is a wasteful number, since it uses less digits than its factorization.

611413552531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698068.

The product of its digits is 54000, while the sum is 37.

Adding to 611413552531 its reverse (135255314116), we get a palindrome (746668866647).

The spelling of 611413552531 in words is "six hundred eleven billion, four hundred thirteen million, five hundred fifty-two thousand, five hundred thirty-one".