55641400 has 24 divisors (see below), whose sum is σ = 129366720. Its totient is φ = 22256480.

The previous prime is 55641379. The next prime is 55641407. The reversal of 55641400 is 414655.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55641407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138904 + ... + 139303.

It is an arithmetic number, because the mean of its divisors is an integer number (5390280).

Almost surely, 2^55641400 is an apocalyptic number.

55641400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55641400 is an abundant number, since it is smaller than the sum of its proper divisors (73725320).

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

55641400 is a wasteful number, since it uses less digits than its factorization.

55641400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278223 (or 278214 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 55641400 is about 7459.3163225593. The cubic root of 55641400 is about 381.7678477592.

The spelling of 55641400 in words is "fifty-five million, six hundred forty-one thousand, four hundred".