52121016136 has 64 divisors (see below), whose sum is σ = 114520049280. Its totient is φ = 21772177920.

The previous prime is 52121016133. The next prime is 52121016161. The reversal of 52121016136 is 63161012125.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (52121016133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2554471 + ... + 2574793.

It is an arithmetic number, because the mean of its divisors is an integer number (1789375770).

Almost surely, 2^52121016136 is an apocalyptic number.

52121016136 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52121016136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57260024640).

52121016136 is an abundant number, since it is smaller than the sum of its proper divisors (62399033144).

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

52121016136 is a wasteful number, since it uses less digits than its factorization.

52121016136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21494 (or 21490 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 52121016136 in words is "fifty-two billion, one hundred twenty-one million, sixteen thousand, one hundred thirty-six".