55778453 has 4 divisors (see below), whose sum is σ = 55795488. Its totient is φ = 55761420.

The previous prime is 55778449. The next prime is 55778467. The reversal of 55778453 is 35487755.

It is a happy number.

55778453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55778453 - 2² = 55778449 is a prime.

It is a super-2 number, since 2×55778453² = 6222471638146418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55778413) 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 3 ways as a sum of consecutive naturals, for example, 1883 + ... + 10728.

It is an arithmetic number, because the mean of its divisors is an integer number (13948872).

Almost surely, 2^55778453 is an apocalyptic number.

It is an amenable number.

55778453 is a deficient number, since it is larger than the sum of its proper divisors (17035).

55778453 is a wasteful number, since it uses less digits than its factorization.

55778453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17034.

The product of its digits is 588000, while the sum is 44.

The square root of 55778453 is about 7468.4973722965. The cubic root of 55778453 is about 382.0810409824.

The spelling of 55778453 in words is "fifty-five million, seven hundred seventy-eight thousand, four hundred fifty-three".