612115520 has 56 divisors (see below), whose sum is σ = 1466158104. Its totient is φ = 243408896.

The previous prime is 612115477. The next prime is 612115523. The reversal of 612115520 is 25511216.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 89718784 + 522396736 = 9472^2 + 22856^2 .

It is not an unprimeable number, because it can be changed into a prime (612115523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49832 + ... + 60888.

Almost surely, 2^612115520 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 612115520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733079052).

612115520 is an abundant number, since it is smaller than the sum of its proper divisors (854042584).

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

612115520 is a wasteful number, since it uses less digits than its factorization.

612115520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11247 (or 11237 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 612115520 is about 24740.9684531548. The cubic root of 612115520 is about 849.0718912413.

Adding to 612115520 its reverse (25511216), we get a palindrome (637626736).

The spelling of 612115520 in words is "six hundred twelve million, one hundred fifteen thousand, five hundred twenty".