52139809563840 has 840 divisors, whose sum is σ = 196171365075840. Its totient is φ = 13143533174784.

The previous prime is 52139809563823. The next prime is 52139809563847. The reversal of 52139809563840 is 4836590893125.

52139809563840 is a `hidden beast` number, since 5 + 21 + 3 + 9 + 8 + 0 + 9 + 563 + 8 + 40 = 666.

It is a super-2 number, since 2×52139809563840² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52139809563847) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4482054664 + ... + 4482066296.

It is an arithmetic number, because the mean of its divisors is an integer number (233537339376).

Almost surely, 2^{52139809563840} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52139809563840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98085682537920).

52139809563840 is an abundant number, since it is smaller than the sum of its proper divisors (144031555512000).

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

52139809563840 is a wasteful number, since it uses less digits than its factorization.

52139809563840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12179 (or 12141 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 63.

The spelling of 52139809563840 in words is "fifty-two trillion, one hundred thirty-nine billion, eight hundred nine million, five hundred sixty-three thousand, eight hundred forty".