9287987664399 has 128 divisors (see below), whose sum is σ = 13683177553920. Its totient is φ = 5584135334400.

The previous prime is 9287987664343. The next prime is 9287987664443. The reversal of 9287987664399 is 9934667897829.

It is a Cunningham number, because it is equal to 3047620²-1.

It is not a de Polignac number, because 9287987664399 - 2⁸ = 9287987664143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9287987664899) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8737523142 + ... + 8737524204.

It is an arithmetic number, because the mean of its divisors is an integer number (106899824640).

Almost surely, 2^{9287987664399} is an apocalyptic number.

9287987664399 is a deficient number, since it is larger than the sum of its proper divisors (4395189889521).

9287987664399 is a wasteful number, since it uses less digits than its factorization.

9287987664399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741.

The product of its digits is 17777055744, while the sum is 87.

The spelling of 9287987664399 in words is "nine trillion, two hundred eighty-seven billion, nine hundred eighty-seven million, six hundred sixty-four thousand, three hundred ninety-nine".