2050640802665 has 32 divisors (see below), whose sum is σ = 3037626009600. Its totient is φ = 1294136331264.

The previous prime is 2050640802659. The next prime is 2050640802697. The reversal of 2050640802665 is 5662080460502.

It is a de Polignac number, because none of the positive numbers 2^k-2050640802665 is a prime.

It is a super-2 number, since 2×2050640802665² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6533465 + ... + 6840134.

It is an arithmetic number, because the mean of its divisors is an integer number (94925812800).

Almost surely, 2^{2050640802665} is an apocalyptic number.

It is an amenable number.

2050640802665 is a deficient number, since it is larger than the sum of its proper divisors (986985206935).

2050640802665 is a wasteful number, since it uses less digits than its factorization.

2050640802665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13373961.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 2050640802665 in words is "two trillion, fifty billion, six hundred forty million, eight hundred two thousand, six hundred sixty-five".