515540045515 has 32 divisors (see below), whose sum is σ = 687628237824. Its totient is φ = 367904317440.

The previous prime is 515540045513. The next prime is 515540045551.

515540045515 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 515540045515 - 2¹ = 515540045513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (515540045513) 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, 674862 + ... + 1219228.

It is an arithmetic number, because the mean of its divisors is an integer number (21488382432).

Almost surely, 2^515540045515 is an apocalyptic number.

515540045515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

515540045515 is a deficient number, since it is larger than the sum of its proper divisors (172088192309).

515540045515 is a wasteful number, since it uses less digits than its factorization.

515540045515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544707.

The product of its (nonzero) digits is 250000, while the sum is 40.

The spelling of 515540045515 in words is "five hundred fifteen billion, five hundred forty million, forty-five thousand, five hundred fifteen".