16620255602511 has 32 divisors (see below), whose sum is σ = 25709624505600. Its totient is φ = 9444351790080.

The previous prime is 16620255602453. The next prime is 16620255602543. The reversal of 16620255602511 is 11520655202661.

It is not a de Polignac number, because 16620255602511 - 2¹¹ = 16620255600463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16620255602551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136576216 + ... + 136697853.

It is an arithmetic number, because the mean of its divisors is an integer number (803425765800).

Almost surely, 2^{16620255602511} is an apocalyptic number.

16620255602511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16620255602511 is a deficient number, since it is larger than the sum of its proper divisors (9089368903089).

16620255602511 is a wasteful number, since it uses less digits than its factorization.

16620255602511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273274199.

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 16620255602511 in words is "sixteen trillion, six hundred twenty billion, two hundred fifty-five million, six hundred two thousand, five hundred eleven".