515561556055 has 48 divisors (see below), whose sum is σ = 765888730560. Its totient is φ = 326222567424.

The previous prime is 515561556049. The next prime is 515561556061. The reversal of 515561556055 is 550655165515.

It is an interprime number because it is at equal distance from previous prime (515561556049) and next prime (515561556061).

It is not a de Polignac number, because 515561556055 - 2¹¹ = 515561554007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19583241 + ... + 19609549.

It is an arithmetic number, because the mean of its divisors is an integer number (15956015220).

Almost surely, 2^515561556055 is an apocalyptic number.

515561556055 is a deficient number, since it is larger than the sum of its proper divisors (250327174505).

515561556055 is a wasteful number, since it uses less digits than its factorization.

515561556055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29660 (or 29647 counting only the distinct ones).

The product of its (nonzero) digits is 2812500, while the sum is 49.

The spelling of 515561556055 in words is "five hundred fifteen billion, five hundred sixty-one million, five hundred fifty-six thousand, fifty-five".