53449799936 has 72 divisors (see below), whose sum is σ = 116613176064. Its totient is φ = 24300840960.

The previous prime is 53449799917. The next prime is 53449799947. The reversal of 53449799936 is 63999794435.

It is a super-3 number, since 3×53449799936³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103121 + ... + 342831.

Almost surely, 2^53449799936 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 53449799936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58306588032).

53449799936 is an abundant number, since it is smaller than the sum of its proper divisors (63163376128).

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

53449799936 is a wasteful number, since it uses less digits than its factorization.

53449799936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239807 (or 239793 counting only the distinct ones).

The product of its digits is 198404640, while the sum is 68.

The spelling of 53449799936 in words is "fifty-three billion, four hundred forty-nine million, seven hundred ninety-nine thousand, nine hundred thirty-six".