16781451118100 has 18 divisors (see below), whose sum is σ = 36415748926494. Its totient is φ = 6712580447200.

The previous prime is 16781451118051. The next prime is 16781451118111. The reversal of 16781451118100 is 181115418761.

16781451118100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 986374730896 + 15795076387204 = 993164^2 + 3974302^2 .

It is a super-2 number, since 2×16781451118100² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 83907255491 + ... + 83907255690.

It is an arithmetic number, because the mean of its divisors is an integer number (2023097162583).

Almost surely, 2^{16781451118100} is an apocalyptic number.

16781451118100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16781451118100 is an abundant number, since it is smaller than the sum of its proper divisors (19634297808394).

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

16781451118100 is a wasteful number, since it uses less digits than its factorization.

16781451118100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167814511195 (or 167814511188 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 44.

The spelling of 16781451118100 in words is "sixteen trillion, seven hundred eighty-one billion, four hundred fifty-one million, one hundred eighteen thousand, one hundred".