515005561487 has 2 divisors, whose sum is σ = 515005561488. Its totient is φ = 515005561486.

The previous prime is 515005561471. The next prime is 515005561517. The reversal of 515005561487 is 784165500515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 515005561487 - 2⁴ = 515005561471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515005561087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257502780743 + 257502780744.

It is an arithmetic number, because the mean of its divisors is an integer number (257502780744).

Almost surely, 2^515005561487 is an apocalyptic number.

515005561487 is a deficient number, since it is larger than the sum of its proper divisors (1).

515005561487 is an equidigital number, since it uses as much as digits as its factorization.

515005561487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840000, while the sum is 47.

The spelling of 515005561487 in words is "five hundred fifteen billion, five million, five hundred sixty-one thousand, four hundred eighty-seven".