55909004 has 6 divisors (see below), whose sum is σ = 97840764. Its totient is φ = 27954500.

The previous prime is 55909003. The next prime is 55909019. The reversal of 55909004 is 40090955.

It is not an unprimeable number, because it can be changed into a prime (55909003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6988622 + ... + 6988629.

It is an arithmetic number, because the mean of its divisors is an integer number (16306794).

Almost surely, 2^55909004 is an apocalyptic number.

It is an amenable number.

55909004 is a deficient number, since it is larger than the sum of its proper divisors (41931760).

55909004 is a wasteful number, since it uses less digits than its factorization.

55909004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13977255 (or 13977253 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 55909004 is about 7477.2323756855. The cubic root of 55909004 is about 382.3788991088.

Adding to 55909004 its reverse (40090955), we get a palindrome (95999959).

The spelling of 55909004 in words is "fifty-five million, nine hundred nine thousand, four".