55601840 has 40 divisors (see below), whose sum is σ = 147743520. Its totient is φ = 19063296.

The previous prime is 55601839. The next prime is 55601851. The reversal of 55601840 is 4810655.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×55601840² = 6183129222771200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 49085 + ... + 50204.

It is an arithmetic number, because the mean of its divisors is an integer number (3693588).

Almost surely, 2^55601840 is an apocalyptic number.

It is an amenable number.

55601840 is an abundant number, since it is smaller than the sum of its proper divisors (92141680).

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

55601840 is a wasteful number, since it uses less digits than its factorization.

55601840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99309 (or 99303 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 55601840 is about 7456.6641335117. The cubic root of 55601840 is about 381.6773496964.

The spelling of 55601840 in words is "fifty-five million, six hundred one thousand, eight hundred forty".