55911969 has 12 divisors (see below), whose sum is σ = 81968016. Its totient is φ = 36717912.

The previous prime is 55911967. The next prime is 55912009. The reversal of 55911969 is 96911955.

It is a happy number.

55911969 is a `hidden beast` number, since 559 + 1 + 1 + 96 + 9 = 666.

It is not a de Polignac number, because 55911969 - 2¹ = 55911967 is a prime.

It is a super-2 number, since 2×55911969² = 6252296554913922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55911967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45759 + ... + 46964.

It is an arithmetic number, because the mean of its divisors is an integer number (6830668).

Almost surely, 2^55911969 is an apocalyptic number.

It is an amenable number.

55911969 is a deficient number, since it is larger than the sum of its proper divisors (26056047).

55911969 is a wasteful number, since it uses less digits than its factorization.

55911969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92796 (or 92793 counting only the distinct ones).

The product of its digits is 109350, while the sum is 45.

The square root of 55911969 is about 7477.4306416041. The cubic root of 55911969 is about 382.3856585054.

The spelling of 55911969 in words is "fifty-five million, nine hundred eleven thousand, nine hundred sixty-nine".