9918077913 has 32 divisors (see below), whose sum is σ = 15026878080. Its totient is φ = 6463618560.

The previous prime is 9918077893. The next prime is 9918077929. The reversal of 9918077913 is 3197708199.

It is not a de Polignac number, because 9918077913 - 2¹² = 9918073817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9918077913.

It is not an unprimeable number, because it can be changed into a prime (9918070913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200458 + ... + 244988.

It is an arithmetic number, because the mean of its divisors is an integer number (469589940).

Almost surely, 2^9918077913 is an apocalyptic number.

It is an amenable number.

9918077913 is a deficient number, since it is larger than the sum of its proper divisors (5108800167).

9918077913 is a wasteful number, since it uses less digits than its factorization.

9918077913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44726 (or 44720 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 54.

The square root of 9918077913 is about 99589.5472075258. The cubic root of 9918077913 is about 2148.5353581943.

The spelling of 9918077913 in words is "nine billion, nine hundred eighteen million, seventy-seven thousand, nine hundred thirteen".