53917871766 has 144 divisors (see below), whose sum is σ = 123775066800. Its totient is φ = 15644534400.

The previous prime is 53917871743. The next prime is 53917871807. The reversal of 53917871766 is 66717871935.

53917871766 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 71 ways as a sum of consecutive naturals, for example, 76047420 + ... + 76048128.

It is an arithmetic number, because the mean of its divisors is an integer number (859549075).

Almost surely, 2^53917871766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53917871766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61887533400).

53917871766 is an abundant number, since it is smaller than the sum of its proper divisors (69857195034).

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

53917871766 is a wasteful number, since it uses less digits than its factorization.

53917871766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 865 counting only the distinct ones).

The product of its digits is 13335840, while the sum is 60.

The spelling of 53917871766 in words is "fifty-three billion, nine hundred seventeen million, eight hundred seventy-one thousand, seven hundred sixty-six".