55977757 has 4 divisors (see below), whose sum is σ = 61066656. Its totient is φ = 50888860.

The previous prime is 55977739. The next prime is 55977767. The reversal of 55977757 is 75777955.

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 not a de Polignac number, because 55977757 - 2¹⁵ = 55944989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55977737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2544433 + ... + 2544454.

It is an arithmetic number, because the mean of its divisors is an integer number (15266664).

Almost surely, 2^55977757 is an apocalyptic number.

It is an amenable number.

55977757 is a deficient number, since it is larger than the sum of its proper divisors (5088899).

55977757 is a wasteful number, since it uses less digits than its factorization.

55977757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088898.

The product of its digits is 2701125, while the sum is 52.

The square root of 55977757 is about 7481.8284529920. The cubic root of 55977757 is about 382.5355758842.

The spelling of 55977757 in words is "fifty-five million, nine hundred seventy-seven thousand, seven hundred fifty-seven".