55377773 has 4 divisors (see below), whose sum is σ = 60412128. Its totient is φ = 50343420.

The previous prime is 55377769. The next prime is 55377779. The reversal of 55377773 is 37777355.

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 55377773 - 2² = 55377769 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 (55377779) 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, 2517161 + ... + 2517182.

It is an arithmetic number, because the mean of its divisors is an integer number (15103032).

Almost surely, 2^55377773 is an apocalyptic number.

It is an amenable number.

55377773 is a deficient number, since it is larger than the sum of its proper divisors (5034355).

55377773 is a wasteful number, since it uses less digits than its factorization.

55377773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034354.

The product of its digits is 540225, while the sum is 44.

The square root of 55377773 is about 7441.6243522500. The cubic root of 55377773 is about 381.1639587973.

The spelling of 55377773 in words is "fifty-five million, three hundred seventy-seven thousand, seven hundred seventy-three".