52146570840 has 512 divisors, whose sum is σ = 204374016000. Its totient is φ = 10335983616.

The previous prime is 52146570799. The next prime is 52146570887. The reversal of 52146570840 is 4807564125.

It is a happy number.

It is a super-2 number, since 2×52146570840² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 52146570792 and 52146570801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 26348971 + ... + 26350949.

It is an arithmetic number, because the mean of its divisors is an integer number (399168000).

Almost surely, 2^52146570840 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 52146570840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102187008000).

52146570840 is an abundant number, since it is smaller than the sum of its proper divisors (152227445160).

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

52146570840 is a wasteful number, since it uses less digits than its factorization.

52146570840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159 (or 2155 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 42.

The spelling of 52146570840 in words is "fifty-two billion, one hundred forty-six million, five hundred seventy thousand, eight hundred forty".