16645261106111 has 32 divisors (see below), whose sum is σ = 18308818644480. Its totient is φ = 15007248921600.

The previous prime is 16645261106051. The next prime is 16645261106137. The reversal of 16645261106111 is 11160116254661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16645261106111 is a prime.

It is a super-2 number, since 2×16645261106111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16645261106611) 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, 2808375830 + ... + 2808381756.

It is an arithmetic number, because the mean of its divisors is an integer number (572150582640).

Almost surely, 2^{16645261106111} is an apocalyptic number.

16645261106111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16645261106111 is a deficient number, since it is larger than the sum of its proper divisors (1663557538369).

16645261106111 is a wasteful number, since it uses less digits than its factorization.

16645261106111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9695.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 16645261106111 in words is "sixteen trillion, six hundred forty-five billion, two hundred sixty-one million, one hundred six thousand, one hundred eleven".