16555230661651 has 8 divisors (see below), whose sum is σ = 18263175807600. Its totient is φ = 14881106211840.

The previous prime is 16555230661643. The next prime is 16555230661709. The reversal of 16555230661651 is 15616603255561.

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

It is not a de Polignac number, because 16555230661651 - 2³ = 16555230661643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16555230661451) 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, 8455173006 + ... + 8455174963.

It is an arithmetic number, because the mean of its divisors is an integer number (2282896975950).

Almost surely, 2^{16555230661651} is an apocalyptic number.

16555230661651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16555230661651 is a deficient number, since it is larger than the sum of its proper divisors (1707945145949).

16555230661651 is a wasteful number, since it uses less digits than its factorization.

16555230661651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16910348069.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 16555230661651 in words is "sixteen trillion, five hundred fifty-five billion, two hundred thirty million, six hundred sixty-one thousand, six hundred fifty-one".