6515605500551 has 8 divisors (see below), whose sum is σ = 7446433355424. Its totient is φ = 5584784412960.

The previous prime is 6515605500541. The next prime is 6515605500563. The reversal of 6515605500551 is 1550055065156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6515605500551 is a prime.

It is a super-2 number, since 2×6515605500551² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6515605500541) 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, 573581 + ... + 3655161.

It is an arithmetic number, because the mean of its divisors is an integer number (930804169428).

Almost surely, 2^{6515605500551} is an apocalyptic number.

6515605500551 is a deficient number, since it is larger than the sum of its proper divisors (930827854873).

6515605500551 is a wasteful number, since it uses less digits than its factorization.

6515605500551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3383641.

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 6515605500551 in words is "six trillion, five hundred fifteen billion, six hundred five million, five hundred thousand, five hundred fifty-one".