515661205340 has 24 divisors (see below), whose sum is σ = 1082905219872. Its totient is φ = 206261303360.

The previous prime is 515661205337. The next prime is 515661205439. The reversal of 515661205340 is 43502166515.

It is a junction number, because it is equal to n+sod(n) for n = 515661205294 and 515661205303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475705 + ... + 1791375.

It is an arithmetic number, because the mean of its divisors is an integer number (45121050828).

Almost surely, 2^515661205340 is an apocalyptic number.

It is an amenable number.

515661205340 is an abundant number, since it is smaller than the sum of its proper divisors (567244014532).

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

515661205340 is a wasteful number, since it uses less digits than its factorization.

515661205340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397357 (or 397355 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 515661205340 in words is "five hundred fifteen billion, six hundred sixty-one million, two hundred five thousand, three hundred forty".