52685387544 has 32 divisors (see below), whose sum is σ = 131742861120. Its totient is φ = 17557876896.

The previous prime is 52685387507. The next prime is 52685387549. The reversal of 52685387544 is 44578358625.

It is a super-2 number, since 2×52685387544² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52685387549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134122 + ... + 351225.

It is an arithmetic number, because the mean of its divisors is an integer number (4116964410).

Almost surely, 2^52685387544 is an apocalyptic number.

It is an amenable number.

52685387544 is an abundant number, since it is smaller than the sum of its proper divisors (79057473576).

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

52685387544 is a wasteful number, since it uses less digits than its factorization.

52685387544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489879 (or 489875 counting only the distinct ones).

The product of its digits is 32256000, while the sum is 57.

The spelling of 52685387544 in words is "fifty-two billion, six hundred eighty-five million, three hundred eighty-seven thousand, five hundred forty-four".