9918480385 has 32 divisors (see below), whose sum is σ = 13444704000. Its totient is φ = 6958076160.

The previous prime is 9918480373. The next prime is 9918480389. The reversal of 9918480385 is 5830848199.

It is not a de Polignac number, because 9918480385 - 2⁵ = 9918480353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (9918480389) 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, 2178091 + ... + 2182639.

It is an arithmetic number, because the mean of its divisors is an integer number (420147000).

It is a Proth number, since it is equal to 9459 ⋅ 2²⁰ + 1 and 9459 < 2²⁰.

Almost surely, 2^9918480385 is an apocalyptic number.

It is an amenable number.

9918480385 is a deficient number, since it is larger than the sum of its proper divisors (3526223615).

9918480385 is a wasteful number, since it uses less digits than its factorization.

9918480385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5961.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The square root of 9918480385 is about 99591.5678408569. The cubic root of 9918480385 is about 2148.5644200627.

The spelling of 9918480385 in words is "nine billion, nine hundred eighteen million, four hundred eighty thousand, three hundred eighty-five".