16556001101655 has 8 divisors (see below), whose sum is σ = 26489601762672. Its totient is φ = 8829867254208.

The previous prime is 16556001101639. The next prime is 16556001101723. The reversal of 16556001101655 is 55610110065561.

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

It is not a de Polignac number, because 16556001101655 - 2⁴ = 16556001101639 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551866703374 + ... + 551866703403.

It is an arithmetic number, because the mean of its divisors is an integer number (3311200220334).

Almost surely, 2^{16556001101655} is an apocalyptic number.

16556001101655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16556001101655 is a deficient number, since it is larger than the sum of its proper divisors (9933600661017).

16556001101655 is a wasteful number, since it uses less digits than its factorization.

16556001101655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103733406785.

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 16556001101655 in words is "sixteen trillion, five hundred fifty-six billion, one million, one hundred one thousand, six hundred fifty-five".