9918977155 has 16 divisors (see below), whose sum is σ = 12710419200. Its totient is φ = 7414404480.

The previous prime is 9918977153. The next prime is 9918977161. The reversal of 9918977155 is 5517798199.

9918977155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9918977155 - 2¹ = 9918977153 is a prime.

It is a super-2 number, since 2×9918977155² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9918977093 and 9918977102.

It is not an unprimeable number, because it can be changed into a prime (9918977153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1098840 + ... + 1107829.

It is an arithmetic number, because the mean of its divisors is an integer number (794401200).

Almost surely, 2^9918977155 is an apocalyptic number.

9918977155 is a deficient number, since it is larger than the sum of its proper divisors (2791442045).

9918977155 is a wasteful number, since it uses less digits than its factorization.

9918977155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206734.

The product of its digits is 7144200, while the sum is 61.

The square root of 9918977155 is about 99594.0618460759. The cubic root of 9918977155 is about 2148.6002899570.

The spelling of 9918977155 in words is "nine billion, nine hundred eighteen million, nine hundred seventy-seven thousand, one hundred fifty-five".