55601601 has 16 divisors (see below), whose sum is σ = 81113088. Its totient is φ = 33598800.

The previous prime is 55601599. The next prime is 55601647. The reversal of 55601601 is 10610655.

It is not a de Polignac number, because 55601601 - 2¹ = 55601599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55601401) 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 15 ways as a sum of consecutive naturals, for example, 9816 + ... + 14406.

It is an arithmetic number, because the mean of its divisors is an integer number (5069568).

Almost surely, 2^55601601 is an apocalyptic number.

It is an amenable number.

55601601 is a deficient number, since it is larger than the sum of its proper divisors (25511487).

55601601 is a wasteful number, since it uses less digits than its factorization.

55601601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4972.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 55601601 is about 7456.6481075615. The cubic root of 55601601 is about 381.6768028259.

The spelling of 55601601 in words is "fifty-five million, six hundred one thousand, six hundred one".