55401864 has 32 divisors (see below), whose sum is σ = 158291520. Its totient is φ = 15829056.

The previous prime is 55401859. The next prime is 55401869. The reversal of 55401864 is 46810455.

55401864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55401859) and next prime (55401869).

It is not an unprimeable number, because it can be changed into a prime (55401869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164719 + ... + 165054.

It is an arithmetic number, because the mean of its divisors is an integer number (4946610).

Almost surely, 2^55401864 is an apocalyptic number.

It is an amenable number.

55401864 is an abundant number, since it is smaller than the sum of its proper divisors (102889656).

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

55401864 is a wasteful number, since it uses less digits than its factorization.

55401864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329789 (or 329785 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 55401864 is about 7443.2428416652. The cubic root of 55401864 is about 381.2192233868.

It can be divided in two parts, 55401 and 864, that added together give a palindrome (56265).

The spelling of 55401864 in words is "fifty-five million, four hundred one thousand, eight hundred sixty-four".