511201645452 has 96 divisors (see below), whose sum is σ = 1334745397440. Its totient is φ = 169192558080.

The previous prime is 511201645441. The next prime is 511201645453. The reversal of 511201645452 is 254546102115.

511201645452 is a `hidden beast` number, since 5 + 1 + 1 + 2 + 0 + 1 + 645 + 4 + 5 + 2 = 666.

It is a super-2 number, since 2×511201645452² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (511201645453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25101658 + ... + 25122014.

It is an arithmetic number, because the mean of its divisors is an integer number (13903597890).

Almost surely, 2^511201645452 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 511201645452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667372698720).

511201645452 is an abundant number, since it is smaller than the sum of its proper divisors (823543751988).

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

511201645452 is a wasteful number, since it uses less digits than its factorization.

511201645452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22008 (or 22000 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

Adding to 511201645452 its reverse (254546102115), we get a palindrome (765747747567).

The spelling of 511201645452 in words is "five hundred eleven billion, two hundred one million, six hundred forty-five thousand, four hundred fifty-two".