55477642 has 8 divisors (see below), whose sum is σ = 90781632. Its totient is φ = 25217100.

The previous prime is 55477637. The next prime is 55477673. The reversal of 55477642 is 24677455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 55477595 and 55477604.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1260834 + ... + 1260877.

It is an arithmetic number, because the mean of its divisors is an integer number (11347704).

Almost surely, 2^55477642 is an apocalyptic number.

55477642 is a deficient number, since it is larger than the sum of its proper divisors (35303990).

55477642 is a wasteful number, since it uses less digits than its factorization.

55477642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521724.

The product of its digits is 235200, while the sum is 40.

The square root of 55477642 is about 7448.3314910119. The cubic root of 55477642 is about 381.3929532178.

The spelling of 55477642 in words is "fifty-five million, four hundred seventy-seven thousand, six hundred forty-two".