2631906245 has 6 divisors (see below), whose sum is σ = 3158425158. Its totient is φ = 2105433224.

The previous prime is 2631906227. The next prime is 2631906247. The reversal of 2631906245 is 5426091362.

It can be written as a sum of positive squares in only one way, i.e., 2105524996 + 526381249 = 45886^2 + 22943^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2631906245 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2631906199 and 2631906208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2631906247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 103244 + ... + 126186.

It is an arithmetic number, because the mean of its divisors is an integer number (526404193).

Almost surely, 2^2631906245 is an apocalyptic number.

It is an amenable number.

2631906245 is a deficient number, since it is larger than the sum of its proper divisors (526518913).

2631906245 is an frugal number, since it uses more digits than its factorization.

2631906245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45891 (or 22948 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 2631906245 is about 51302.1076077777. The cubic root of 2631906245 is about 1380.6707942735.

The spelling of 2631906245 in words is "two billion, six hundred thirty-one million, nine hundred six thousand, two hundred forty-five".