1297664086587 has 8 divisors (see below), whose sum is σ = 1887511398720. Its totient is φ = 786463082760.

The previous prime is 1297664086577. The next prime is 1297664086613. The reversal of 1297664086587 is 7856804667921.

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

It is not a de Polignac number, because 1297664086587 - 2¹⁴ = 1297664070203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1297664086577) 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, 19661577037 + ... + 19661577102.

It is an arithmetic number, because the mean of its divisors is an integer number (235938924840).

Almost surely, 2^{1297664086587} is an apocalyptic number.

1297664086587 is a deficient number, since it is larger than the sum of its proper divisors (589847312133).

1297664086587 is a wasteful number, since it uses less digits than its factorization.

1297664086587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39323154153.

The product of its (nonzero) digits is 243855360, while the sum is 69.

The spelling of 1297664086587 in words is "one trillion, two hundred ninety-seven billion, six hundred sixty-four million, eighty-six thousand, five hundred eighty-seven".