16122061651661 has 8 divisors (see below), whose sum is σ = 18425410066560. Its totient is φ = 13818762424368.

The previous prime is 16122061651639. The next prime is 16122061651693. The reversal of 16122061651661 is 16615616022161.

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

It is a cyclic number.

It is not a de Polignac number, because 16122061651661 - 2¹⁰ = 16122061650637 is a prime.

It is a super-2 number, since 2×16122061651661² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16122061651061) 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, 11591846 + ... + 12907943.

It is an arithmetic number, because the mean of its divisors is an integer number (2303176258320).

Almost surely, 2^{16122061651661} is an apocalyptic number.

It is an amenable number.

16122061651661 is a deficient number, since it is larger than the sum of its proper divisors (2303348414899).

16122061651661 is an equidigital number, since it uses as much as digits as its factorization.

16122061651661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24593803.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 16122061651661 in words is "sixteen trillion, one hundred twenty-two billion, sixty-one million, six hundred fifty-one thousand, six hundred sixty-one".