2636658240841 has 9 divisors (see below), whose sum is σ = 2641204523559. Its totient is φ = 2632119778536.

The previous prime is 2636658240773. The next prime is 2636658240857. The reversal of 2636658240841 is 1480428566362.

The square root of 2636658240841 is 1623779.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 567076772025 + 2069581468816 = 753045^2 + 1438604^2 .

It is not a de Polignac number, because 2636658240841 - 2¹¹ = 2636658238793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2636658246841) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1336369131 + ... + 1336371103.

Almost surely, 2^{2636658240841} is an apocalyptic number.

2636658240841 is the 1623779-th square number.

2636658240841 is the 811890-th centered octagonal number.

It is an amenable number.

2636658240841 is a deficient number, since it is larger than the sum of its proper divisors (4546282718).

2636658240841 is an frugal number, since it uses more digits than its factorization.

2636658240841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5592 (or 2796 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 55.

The spelling of 2636658240841 in words is "two trillion, six hundred thirty-six billion, six hundred fifty-eight million, two hundred forty thousand, eight hundred forty-one".