515665332054 has 64 divisors (see below), whose sum is σ = 1161046656000. Its totient is φ = 169632468000.

The previous prime is 515665332053. The next prime is 515665332073. The reversal of 515665332054 is 450233566515.

515665332054 is a `hidden beast` number, since 5 + 1 + 5 + 66 + 533 + 2 + 0 + 54 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515665332053) 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, 1302867 + ... + 1651905.

It is an arithmetic number, because the mean of its divisors is an integer number (18141354000).

Almost surely, 2^515665332054 is an apocalyptic number.

515665332054 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 515665332054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (580523328000).

515665332054 is an abundant number, since it is smaller than the sum of its proper divisors (645381323946).

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

515665332054 is a wasteful number, since it uses less digits than its factorization.

515665332054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349410 (or 349404 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 45.

Adding to 515665332054 its reverse (450233566515), we get a palindrome (965898898569).

The spelling of 515665332054 in words is "five hundred fifteen billion, six hundred sixty-five million, three hundred thirty-two thousand, fifty-four".