971515205487 has 24 divisors (see below), whose sum is σ = 1448616793728. Its totient is φ = 626762664000.

The previous prime is 971515205473. The next prime is 971515205527. The reversal of 971515205487 is 784502515179.

971515205487 is a `hidden beast` number, since 9 + 7 + 1 + 5 + 152 + 0 + 5 + 487 = 666.

It is not a de Polignac number, because 971515205487 - 2¹⁰ = 971515204463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971515205447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14936737 + ... + 15001637.

It is an arithmetic number, because the mean of its divisors is an integer number (60359033072).

Almost surely, 2^971515205487 is an apocalyptic number.

971515205487 is a deficient number, since it is larger than the sum of its proper divisors (477101588241).

971515205487 is a wasteful number, since it uses less digits than its factorization.

971515205487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118591 (or 118588 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 54.

The spelling of 971515205487 in words is "nine hundred seventy-one billion, five hundred fifteen million, two hundred five thousand, four hundred eighty-seven".