52181537772 has 192 divisors, whose sum is σ = 155073142784. Its totient is φ = 13285140480.

The previous prime is 52181537743. The next prime is 52181537773. The reversal of 52181537772 is 27773518125.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (52181537773) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15468678 + ... + 15472050.

Almost surely, 2^52181537772 is an apocalyptic number.

52181537772 is a gapful number since it is divisible by the number (52) 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 52181537772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77536571392).

52181537772 is an abundant number, since it is smaller than the sum of its proper divisors (102891605012).

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

52181537772 is a wasteful number, since it uses less digits than its factorization.

52181537772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888 (or 3886 counting only the distinct ones).

The product of its digits is 823200, while the sum is 48.

The spelling of 52181537772 in words is "fifty-two billion, one hundred eighty-one million, five hundred thirty-seven thousand, seven hundred seventy-two".