8515487537 has 2 divisors, whose sum is σ = 8515487538. Its totient is φ = 8515487536.

The previous prime is 8515487509. The next prime is 8515487597. The reversal of 8515487537 is 7357845158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7259210401 + 1256277136 = 85201^2 + 35444^2 .

It is a cyclic number.

It is not a de Polignac number, because 8515487537 - 2²² = 8511293233 is a prime.

It is not a weakly prime, because it can be changed into another prime (8515487597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4257743768 + 4257743769.

It is an arithmetic number, because the mean of its divisors is an integer number (4257743769).

Almost surely, 2^8515487537 is an apocalyptic number.

It is an amenable number.

8515487537 is a deficient number, since it is larger than the sum of its proper divisors (1).

8515487537 is an equidigital number, since it uses as much as digits as its factorization.

8515487537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704000, while the sum is 53.

The square root of 8515487537 is about 92279.3993099218. The cubic root of 8515487537 is about 2042.0663044773.

The spelling of 8515487537 in words is "eight billion, five hundred fifteen million, four hundred eighty-seven thousand, five hundred thirty-seven".