55009977 has 16 divisors (see below), whose sum is σ = 84722112. Its totient is φ = 31377920.

The previous prime is 55009957. The next prime is 55010003. The reversal of 55009977 is 77990055.

It is a happy number.

It is not a de Polignac number, because 55009977 - 2¹⁰ = 55008953 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55009957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48468 + ... + 49589.

It is an arithmetic number, because the mean of its divisors is an integer number (5295132).

Almost surely, 2^55009977 is an apocalyptic number.

It is an amenable number.

55009977 is a deficient number, since it is larger than the sum of its proper divisors (29712135).

55009977 is a wasteful number, since it uses less digits than its factorization.

55009977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98088.

The product of its (nonzero) digits is 99225, while the sum is 42.

The square root of 55009977 is about 7416.8711057966. The cubic root of 55009977 is about 380.3182398717.

The spelling of 55009977 in words is "fifty-five million, nine thousand, nine hundred seventy-seven".