16742121378228 has 48 divisors (see below), whose sum is σ = 43425773939520. Its totient is φ = 5578100460000.

The previous prime is 16742121378221. The next prime is 16742121378247. The reversal of 16742121378228 is 82287312124761.

16742121378228 is a `hidden beast` number, since 1 + 6 + 7 + 4 + 21 + 21 + 378 + 228 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16742121378221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35971398 + ... + 36433853.

It is an arithmetic number, because the mean of its divisors is an integer number (904703623740).

Almost surely, 2^{16742121378228} is an apocalyptic number.

16742121378228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16742121378228 is an abundant number, since it is smaller than the sum of its proper divisors (26683652561292).

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

16742121378228 is a wasteful number, since it uses less digits than its factorization.

16742121378228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72407405 (or 72407397 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The spelling of 16742121378228 in words is "sixteen trillion, seven hundred forty-two billion, one hundred twenty-one million, three hundred seventy-eight thousand, two hundred twenty-eight".