2639368440361 has 4 divisors (see below), whose sum is σ = 2724509357824. Its totient is φ = 2554227522900.

The previous prime is 2639368440323. The next prime is 2639368440391. The reversal of 2639368440361 is 1630448639362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2639368440361 - 2¹¹ = 2639368438313 is a prime.

It is a super-2 number, since 2×2639368440361² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2639368440301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42570458685 + ... + 42570458746.

It is an arithmetic number, because the mean of its divisors is an integer number (681127339456).

Almost surely, 2^{2639368440361} is an apocalyptic number.

It is an amenable number.

2639368440361 is a deficient number, since it is larger than the sum of its proper divisors (85140917463).

2639368440361 is an equidigital number, since it uses as much as digits as its factorization.

2639368440361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85140917462.

The product of its (nonzero) digits is 13436928, while the sum is 55.

The spelling of 2639368440361 in words is "two trillion, six hundred thirty-nine billion, three hundred sixty-eight million, four hundred forty thousand, three hundred sixty-one".