52865021004 has 24 divisors (see below), whose sum is σ = 124090353408. Its totient is φ = 17516154000.

The previous prime is 52865020997. The next prime is 52865021009. The reversal of 52865021004 is 40012056825.

It is a super-2 number, since 2×52865021004² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52865021009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13187872 + ... + 13191879.

It is an arithmetic number, because the mean of its divisors is an integer number (5170431392).

Almost surely, 2^52865021004 is an apocalyptic number.

It is an amenable number.

52865021004 is an abundant number, since it is smaller than the sum of its proper divisors (71225332404).

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

52865021004 is a wasteful number, since it uses less digits than its factorization.

52865021004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26379925 (or 26379923 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 52865021004 its reverse (40012056825), we get a palindrome (92877077829).

The spelling of 52865021004 in words is "fifty-two billion, eight hundred sixty-five million, twenty-one thousand, four".