2117206016655 has 32 divisors (see below), whose sum is σ = 3448644147648. Its totient is φ = 1108865049600.

The previous prime is 2117206016641. The next prime is 2117206016677. The reversal of 2117206016655 is 5566106027112.

It is not a de Polignac number, because 2117206016655 - 2⁵ = 2117206016623 is a prime.

It is a super-2 number, since 2×2117206016655² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 1310556 + ... + 2439665.

It is an arithmetic number, because the mean of its divisors is an integer number (107770129614).

Almost surely, 2^{2117206016655} is an apocalyptic number.

2117206016655 is a deficient number, since it is larger than the sum of its proper divisors (1331438130993).

2117206016655 is a wasteful number, since it uses less digits than its factorization.

2117206016655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750907.

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 2117206016655 in words is "two trillion, one hundred seventeen billion, two hundred six million, sixteen thousand, six hundred fifty-five".