55195779 has 16 divisors (see below), whose sum is σ = 79969280. Its totient is φ = 33734880.

The previous prime is 55195759. The next prime is 55195781. The reversal of 55195779 is 97759155.

It is not a de Polignac number, because 55195779 - 2²¹ = 53098627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55195759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13852 + ... + 17385.

It is an arithmetic number, because the mean of its divisors is an integer number (4998080).

Almost surely, 2^55195779 is an apocalyptic number.

55195779 is a deficient number, since it is larger than the sum of its proper divisors (24773501).

55195779 is a wasteful number, since it uses less digits than its factorization.

55195779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31290.

The product of its digits is 496125, while the sum is 48.

The square root of 55195779 is about 7429.3861792210. The cubic root of 55195779 is about 380.7459470148.

The spelling of 55195779 in words is "fifty-five million, one hundred ninety-five thousand, seven hundred seventy-nine".