16686926761842 has 12 divisors (see below), whose sum is σ = 36155007984030. Its totient is φ = 5562308920608.

The previous prime is 16686926761831. The next prime is 16686926761889. The reversal of 16686926761842 is 24816762968661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16428924734121 + 258002027721 = 4053261^2 + 507939^2 .

It is a super-3 number, since 3×16686926761842³ (a number of 41 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 463525743367 + ... + 463525743402.

Almost surely, 2^{16686926761842} is an apocalyptic number.

16686926761842 is an abundant number, since it is smaller than the sum of its proper divisors (19468081222188).

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

16686926761842 is a wasteful number, since it uses less digits than its factorization.

16686926761842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927051486777 (or 927051486774 counting only the distinct ones).

The product of its digits is 501645312, while the sum is 72.

The spelling of 16686926761842 in words is "sixteen trillion, six hundred eighty-six billion, nine hundred twenty-six million, seven hundred sixty-one thousand, eight hundred forty-two".