555551387779 has 8 divisors (see below), whose sum is σ = 573826229120. Its totient is φ = 537298660800.

The previous prime is 555551387777. The next prime is 555551387827. The reversal of 555551387779 is 977783155555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 555551387779 - 2¹ = 555551387777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (555551387777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5477514 + ... + 5578015.

It is an arithmetic number, because the mean of its divisors is an integer number (71728278640).

Almost surely, 2^555551387779 is an apocalyptic number.

555551387779 is a deficient number, since it is larger than the sum of its proper divisors (18274841341).

555551387779 is a wasteful number, since it uses less digits than its factorization.

555551387779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11057181.

The product of its digits is 231525000, while the sum is 67.

The spelling of 555551387779 in words is "five hundred fifty-five billion, five hundred fifty-one million, three hundred eighty-seven thousand, seven hundred seventy-nine".