2611605531 has 16 divisors (see below), whose sum is σ = 3510823680. Its totient is φ = 1726755360.

The previous prime is 2611605523. The next prime is 2611605589. The reversal of 2611605531 is 1355061162.

It is not a de Polignac number, because 2611605531 - 2³ = 2611605523 is a prime.

It is a super-2 number, since 2×2611605531² = 13640966899099583922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2611605511) 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 15 ways as a sum of consecutive naturals, for example, 489826 + ... + 495128.

It is an arithmetic number, because the mean of its divisors is an integer number (219426480).

Almost surely, 2^2611605531 is an apocalyptic number.

2611605531 is a deficient number, since it is larger than the sum of its proper divisors (899218149).

2611605531 is a wasteful number, since it uses less digits than its factorization.

2611605531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6626.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 2611605531 is about 51103.8700197940. The cubic root of 2611605531 is about 1377.1117797335. Note that the first 3 decimals are identical.

Adding to 2611605531 its reverse (1355061162), we get a palindrome (3966666693).

The spelling of 2611605531 in words is "two billion, six hundred eleven million, six hundred five thousand, five hundred thirty-one".