55049660 has 24 divisors (see below), whose sum is σ = 116257680. Its totient is φ = 21895424.

The previous prime is 55049641. The next prime is 55049663. The reversal of 55049660 is 6694055.

It is a happy number.

It is a super-2 number, since 2×55049660² = 6060930132231200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55049660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55049663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4109 + ... + 11268.

It is an arithmetic number, because the mean of its divisors is an integer number (4844070).

Almost surely, 2^55049660 is an apocalyptic number.

It is an amenable number.

55049660 is an abundant number, since it is smaller than the sum of its proper divisors (61208020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55049660 is a wasteful number, since it uses less digits than its factorization.

55049660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15565 (or 15563 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 55049660 is about 7419.5458082015. The cubic root of 55049660 is about 380.4096689902.

The spelling of 55049660 in words is "fifty-five million, forty-nine thousand, six hundred sixty".