55400445 has 24 divisors (see below), whose sum is σ = 100204416. Its totient is φ = 28261728.

The previous prime is 55400417. The next prime is 55400459. The reversal of 55400445 is 54400455.

It is not a de Polignac number, because 55400445 - 2⁹ = 55399933 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25729 + ... + 27798.

It is an arithmetic number, because the mean of its divisors is an integer number (4175184).

Almost surely, 2^55400445 is an apocalyptic number.

It is an amenable number.

55400445 is a deficient number, since it is larger than the sum of its proper divisors (44803971).

55400445 is a wasteful number, since it uses less digits than its factorization.

55400445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53561 (or 53558 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 55400445 is about 7443.1475196989. The cubic root of 55400445 is about 381.2159686546.

The spelling of 55400445 in words is "fifty-five million, four hundred thousand, four hundred forty-five".