55400016 has 40 divisors (see below), whose sum is σ = 163562944. Its totient is φ = 15828480.

The previous prime is 55400011. The next prime is 55400027. The reversal of 55400016 is 61000455.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 55399965 and 55400001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55400011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82105 + ... + 82776.

Almost surely, 2^55400016 is an apocalyptic number.

55400016 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

55400016 is an abundant number, since it is smaller than the sum of its proper divisors (108162928).

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

55400016 is a wasteful number, since it uses less digits than its factorization.

55400016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164899 (or 164893 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 55400016 is about 7443.1187011897. The cubic root of 55400016 is about 381.2149846548.

The spelling of 55400016 in words is "fifty-five million, four hundred thousand, sixteen".