16555662101 has 4 divisors (see below), whose sum is σ = 18060722304. Its totient is φ = 15050601900.

The previous prime is 16555662091. The next prime is 16555662121. The reversal of 16555662101 is 10126655561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10126655561 = 11 ⋅920605051.

It is a cyclic number.

It is not a de Polignac number, because 16555662101 - 2⁶ = 16555662037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16555662121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752530085 + ... + 752530106.

It is an arithmetic number, because the mean of its divisors is an integer number (4515180576).

Almost surely, 2^16555662101 is an apocalyptic number.

16555662101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16555662101 is a deficient number, since it is larger than the sum of its proper divisors (1505060203).

16555662101 is a wasteful number, since it uses less digits than its factorization.

16555662101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505060202.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 16555662101 in words is "sixteen billion, five hundred fifty-five million, six hundred sixty-two thousand, one hundred one".