5511661265 has 32 divisors (see below), whose sum is σ = 7856956800. Its totient is φ = 3666539520.

The previous prime is 5511661247. The next prime is 5511661333. The reversal of 5511661265 is 5621661155.

It is a happy number.

It is not a de Polignac number, because 5511661265 - 2¹⁴ = 5511644881 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60632 + ... + 121241.

It is an arithmetic number, because the mean of its divisors is an integer number (245529900).

Almost surely, 2^5511661265 is an apocalyptic number.

5511661265 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5511661265 is a deficient number, since it is larger than the sum of its proper divisors (2345295535).

5511661265 is a wasteful number, since it uses less digits than its factorization.

5511661265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181937.

The product of its digits is 54000, while the sum is 38.

The square root of 5511661265 is about 74240.5634744241. The cubic root of 5511661265 is about 1766.4208120952.

The spelling of 5511661265 in words is "five billion, five hundred eleven million, six hundred sixty-one thousand, two hundred sixty-five".