53688471786 has 128 divisors (see below), whose sum is σ = 128734272000. Its totient is φ = 16541521920.

The previous prime is 53688471721. The next prime is 53688471787. The reversal of 53688471786 is 68717488635.

53688471786 is a `hidden beast` number, since 5 + 3 + 6 + 88 + 471 + 7 + 86 = 666.

It is a super-2 number, since 2×53688471786² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53688471787) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6843226 + ... + 6851066.

It is an arithmetic number, because the mean of its divisors is an integer number (1005736500).

Almost surely, 2^53688471786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53688471786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64367136000).

53688471786 is an abundant number, since it is smaller than the sum of its proper divisors (75045800214).

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

53688471786 is a wasteful number, since it uses less digits than its factorization.

53688471786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8061 (or 8055 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 63.

The spelling of 53688471786 in words is "fifty-three billion, six hundred eighty-eight million, four hundred seventy-one thousand, seven hundred eighty-six".