16610500661565 has 8 divisors (see below), whose sum is σ = 26576801058528. Its totient is φ = 8858933686160.

The previous prime is 16610500661563. The next prime is 16610500661567. The reversal of 16610500661565 is 56516600501661.

It is an interprime number because it is at equal distance from previous prime (16610500661563) and next prime (16610500661567).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16610500661565 - 2¹ = 16610500661563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16610500661563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553683355371 + ... + 553683355400.

It is an arithmetic number, because the mean of its divisors is an integer number (3322100132316).

Almost surely, 2^{16610500661565} is an apocalyptic number.

16610500661565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16610500661565 is a deficient number, since it is larger than the sum of its proper divisors (9966300396963).

16610500661565 is a wasteful number, since it uses less digits than its factorization.

16610500661565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107366710779.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 16610500661565 in words is "sixteen trillion, six hundred ten billion, five hundred million, six hundred sixty-one thousand, five hundred sixty-five".