16121777734608 has 160 divisors (see below), whose sum is σ = 52509205362432. Its totient is φ = 4148192563200.

The previous prime is 16121777734589. The next prime is 16121777734681. The reversal of 16121777734608 is 80643777712161.

16121777734608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44831683 + ... + 45189858.

Almost surely, 2^{16121777734608} is an apocalyptic number.

It is an amenable number.

16121777734608 is an abundant number, since it is smaller than the sum of its proper divisors (36387427627824).

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

16121777734608 is a wasteful number, since it uses less digits than its factorization.

16121777734608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90021613 (or 90021607 counting only the distinct ones).

The product of its (nonzero) digits is 16595712, while the sum is 60.

The spelling of 16121777734608 in words is "sixteen trillion, one hundred twenty-one billion, seven hundred seventy-seven million, seven hundred thirty-four thousand, six hundred eight".