16878611555442 has 96 divisors (see below), whose sum is σ = 45069567029760. Its totient is φ = 4445574192000.

The previous prime is 16878611555431. The next prime is 16878611555473. The reversal of 16878611555442 is 24455511687861.

16878611555442 is a `hidden beast` number, since 1 + 6 + 8 + 7 + 8 + 61 + 15 + 554 + 4 + 2 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 16878611555442.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5630317 + ... + 8090592.

It is an arithmetic number, because the mean of its divisors is an integer number (469474656560).

Almost surely, 2^{16878611555442} is an apocalyptic number.

16878611555442 is an abundant number, since it is smaller than the sum of its proper divisors (28190955474318).

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

16878611555442 is a wasteful number, since it uses less digits than its factorization.

16878611555442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13721688 (or 13721685 counting only the distinct ones).

The product of its digits is 64512000, while the sum is 63.

The spelling of 16878611555442 in words is "sixteen trillion, eight hundred seventy-eight billion, six hundred eleven million, five hundred fifty-five thousand, four hundred forty-two".