2165615552007 has 6 divisors (see below), whose sum is σ = 3128111352912. Its totient is φ = 1443743701332.

The previous prime is 2165615551919. The next prime is 2165615552077. The reversal of 2165615552007 is 7002555165612.

2165615552007 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 615 + 5 + 5 + 20 + 0 + 7 = 666.

It is not a de Polignac number, because 2165615552007 - 2¹⁰ = 2165615550983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165615552077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120311975103 + ... + 120311975120.

It is an arithmetic number, because the mean of its divisors is an integer number (521351892152).

Almost surely, 2^{2165615552007} is an apocalyptic number.

2165615552007 is a deficient number, since it is larger than the sum of its proper divisors (962495800905).

2165615552007 is a wasteful number, since it uses less digits than its factorization.

2165615552007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240623950229 (or 240623950226 counting only the distinct ones).

The product of its (nonzero) digits is 630000, while the sum is 45.

The spelling of 2165615552007 in words is "two trillion, one hundred sixty-five billion, six hundred fifteen million, five hundred fifty-two thousand, seven".