2609521631 has 2 divisors, whose sum is σ = 2609521632. Its totient is φ = 2609521630.

The previous prime is 2609521619. The next prime is 2609521667. The reversal of 2609521631 is 1361259062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2609521631 - 2¹⁰ = 2609520607 is a prime.

It is a super-2 number, since 2×2609521631² = 13619206285313800322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2609521591 and 2609521600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2609521231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1304760815 + 1304760816.

It is an arithmetic number, because the mean of its divisors is an integer number (1304760816).

Almost surely, 2^2609521631 is an apocalyptic number.

2609521631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2609521631 is an equidigital number, since it uses as much as digits as its factorization.

2609521631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 2609521631 is about 51083.4770840827. The cubic root of 2609521631 is about 1376.7453988693.

The spelling of 2609521631 in words is "two billion, six hundred nine million, five hundred twenty-one thousand, six hundred thirty-one".