990265155 has 32 divisors (see below), whose sum is σ = 1756816128. Its totient is φ = 472252800.

The previous prime is 990265153. The next prime is 990265163. The reversal of 990265155 is 551562099.

It is not a de Polignac number, because 990265155 - 2¹ = 990265153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990265153) 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, 39129 + ... + 59258.

It is an arithmetic number, because the mean of its divisors is an integer number (54900504).

Almost surely, 2^990265155 is an apocalyptic number.

990265155 is a deficient number, since it is larger than the sum of its proper divisors (766550973).

990265155 is a wasteful number, since it uses less digits than its factorization.

990265155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98467.

The product of its (nonzero) digits is 121500, while the sum is 42.

The square root of 990265155 is about 31468.4787525549. The cubic root of 990265155 is about 996.7444646576.

It can be divided in two parts, 9902 and 65155, that added together give a palindrome (75057).

The spelling of 990265155 in words is "nine hundred ninety million, two hundred sixty-five thousand, one hundred fifty-five".