55977945 has 8 divisors (see below), whose sum is σ = 89564736. Its totient is φ = 29854896.

The previous prime is 55977919. The next prime is 55977947. The reversal of 55977945 is 54977955.

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

It is not a de Polignac number, because 55977945 - 2⁹ = 55977433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55977947) 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, 1865917 + ... + 1865946.

It is an arithmetic number, because the mean of its divisors is an integer number (11195592).

Almost surely, 2^55977945 is an apocalyptic number.

It is an amenable number.

55977945 is a deficient number, since it is larger than the sum of its proper divisors (33586791).

55977945 is a wasteful number, since it uses less digits than its factorization.

55977945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731871.

The product of its digits is 1984500, while the sum is 51.

The square root of 55977945 is about 7481.8410167552. The cubic root of 55977945 is about 382.5360041294.

The spelling of 55977945 in words is "fifty-five million, nine hundred seventy-seven thousand, nine hundred forty-five".