9980918372287 has 4 divisors (see below), whose sum is σ = 10036061567896. Its totient is φ = 9925775176680.

The previous prime is 9980918372251. The next prime is 9980918372357. The reversal of 9980918372287 is 7822738190899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9980918372287 is a prime.

It is a super-2 number, since 2×9980918372287² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9980918372387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27571597533 + ... + 27571597894.

It is an arithmetic number, because the mean of its divisors is an integer number (2509015391974).

Almost surely, 2^{9980918372287} is an apocalyptic number.

9980918372287 is a deficient number, since it is larger than the sum of its proper divisors (55143195609).

9980918372287 is a wasteful number, since it uses less digits than its factorization.

9980918372287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55143195608.

The product of its (nonzero) digits is 219469824, while the sum is 73.

The spelling of 9980918372287 in words is "nine trillion, nine hundred eighty billion, nine hundred eighteen million, three hundred seventy-two thousand, two hundred eighty-seven".