515630642340 has 384 divisors, whose sum is σ = 1734020628480. Its totient is φ = 113010163200.

The previous prime is 515630642339. The next prime is 515630642389. The reversal of 515630642340 is 43246036515.

It is a super-2 number, since 2×515630642340² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 140458705 + ... + 140462375.

It is an arithmetic number, because the mean of its divisors is an integer number (4515678720).

Almost surely, 2^515630642340 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 515630642340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (867010314240).

515630642340 is an abundant number, since it is smaller than the sum of its proper divisors (1218389986140).

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

515630642340 is a wasteful number, since it uses less digits than its factorization.

515630642340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223 (or 4221 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

Adding to 515630642340 its reverse (43246036515), we get a palindrome (558876678855).

The spelling of 515630642340 in words is "five hundred fifteen billion, six hundred thirty million, six hundred forty-two thousand, three hundred forty".