549377773945 has 48 divisors (see below), whose sum is σ = 900957653568. Its totient is φ = 316125452160.

The previous prime is 549377773807. The next prime is 549377773949.

549377773945 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 549377773945 - 2³³ = 540787839353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (549377773949) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7805379 + ... + 7875448.

It is an arithmetic number, because the mean of its divisors is an integer number (18769951116).

Almost surely, 2^549377773945 is an apocalyptic number.

549377773945 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

549377773945 is a deficient number, since it is larger than the sum of its proper divisors (351579879623).

549377773945 is a wasteful number, since it uses less digits than its factorization.

549377773945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15680870 (or 15680863 counting only the distinct ones).

The product of its digits is 700131600, while the sum is 70.

The spelling of 549377773945 in words is "five hundred forty-nine billion, three hundred seventy-seven million, seven hundred seventy-three thousand, nine hundred forty-five".