551555661554 has 8 divisors (see below), whose sum is σ = 829587808128. Its totient is φ = 275026392180.

The previous prime is 551555661523. The next prime is 551555661571. The reversal of 551555661554 is 455166555155.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 551555661496 and 551555661505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375718382 + ... + 375719849.

It is an arithmetic number, because the mean of its divisors is an integer number (103698476016).

Almost surely, 2^551555661554 is an apocalyptic number.

551555661554 is a deficient number, since it is larger than the sum of its proper divisors (278032146574).

551555661554 is a wasteful number, since it uses less digits than its factorization.

551555661554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751438600.

The product of its digits is 11250000, while the sum is 53.

The spelling of 551555661554 in words is "five hundred fifty-one billion, five hundred fifty-five million, six hundred sixty-one thousand, five hundred fifty-four".