16011611650661 has 8 divisors (see below), whose sum is σ = 17467512695904. Its totient is φ = 14555760603120.

The previous prime is 16011611650651. The next prime is 16011611650663. The reversal of 16011611650661 is 16605611611061.

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

It is a de Polignac number, because none of the positive numbers 2^k-16011611650661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16011611650663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11828246 + ... + 13112231.

It is an arithmetic number, because the mean of its divisors is an integer number (2183439086988).

Almost surely, 2^{16011611650661} is an apocalyptic number.

16011611650661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16011611650661 is a deficient number, since it is larger than the sum of its proper divisors (1455901045243).

16011611650661 is a wasteful number, since it uses less digits than its factorization.

16011611650661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24998851.

The product of its (nonzero) digits is 38880, while the sum is 41.

The spelling of 16011611650661 in words is "sixteen trillion, eleven billion, six hundred eleven million, six hundred fifty thousand, six hundred sixty-one".