201987764678168 has 32 divisors (see below), whose sum is σ = 433218418557600. Its totient is φ = 86488686012672.

The previous prime is 201987764678149. The next prime is 201987764678207. The reversal of 201987764678168 is 861876467789102.

It is a junction number, because it is equal to n+sod(n) for n = 201987764678092 and 201987764678101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1614496253 + ... + 1614621356.

It is an arithmetic number, because the mean of its divisors is an integer number (13538075579925).

Almost surely, 2^{201987764678168} is an apocalyptic number.

201987764678168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

201987764678168 is an abundant number, since it is smaller than the sum of its proper divisors (231230653879432).

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

201987764678168 is a wasteful number, since it uses less digits than its factorization.

201987764678168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229118739 (or 3229118735 counting only the distinct ones).

The product of its (nonzero) digits is 2731180032, while the sum is 80.

The spelling of 201987764678168 in words is "two hundred one trillion, nine hundred eighty-seven billion, seven hundred sixty-four million, six hundred seventy-eight thousand, one hundred sixty-eight".