16761421206720 has 168 divisors, whose sum is σ = 57654317142240. Its totient is φ = 4469556326400.

The previous prime is 16761421206689. The next prime is 16761421206727. The reversal of 16761421206720 is 2760212416761.

16761421206720 is a `hidden beast` number, since 1 + 6 + 7 + 614 + 2 + 1 + 2 + 0 + 6 + 7 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (16761421206727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99330420 + ... + 99499020.

It is an arithmetic number, because the mean of its divisors is an integer number (343180459180).

Almost surely, 2^{16761421206720} is an apocalyptic number.

16761421206720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16761421206720 is an abundant number, since it is smaller than the sum of its proper divisors (40892895935520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16761421206720 is a wasteful number, since it uses less digits than its factorization.

16761421206720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203143 (or 203130 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 16761421206720 in words is "sixteen trillion, seven hundred sixty-one billion, four hundred twenty-one million, two hundred six thousand, seven hundred twenty".