55945278771 has 4 divisors (see below), whose sum is σ = 74593705032. Its totient is φ = 37296852512.

The previous prime is 55945278709. The next prime is 55945278793. The reversal of 55945278771 is 17787254955.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55945278771 - 2⁷ = 55945278643 is a prime.

It is a super-3 number, since 3×55945278771³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (55945278271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9324213126 + ... + 9324213131.

It is an arithmetic number, because the mean of its divisors is an integer number (18648426258).

Almost surely, 2^55945278771 is an apocalyptic number.

55945278771 is a deficient number, since it is larger than the sum of its proper divisors (18648426261).

55945278771 is a wasteful number, since it uses less digits than its factorization.

55945278771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18648426260.

The product of its digits is 24696000, while the sum is 60.

The spelling of 55945278771 in words is "fifty-five billion, nine hundred forty-five million, two hundred seventy-eight thousand, seven hundred seventy-one".