551551545 has 16 divisors (see below), whose sum is σ = 980536320. Its totient is φ = 294160752.

The previous prime is 551551537. The next prime is 551551547. The reversal of 551551545 is 545155155.

551551545 is a `hidden beast` number, since 5 + 51 + 551 + 54 + 5 = 666.

It is not a de Polignac number, because 551551545 - 2³ = 551551537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (551551547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2042649 + ... + 2042918.

It is an arithmetic number, because the mean of its divisors is an integer number (61283520).

Almost surely, 2^551551545 is an apocalyptic number.

It is an amenable number.

551551545 is a deficient number, since it is larger than the sum of its proper divisors (428984775).

551551545 is a wasteful number, since it uses less digits than its factorization.

551551545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4085581 (or 4085575 counting only the distinct ones).

The product of its digits is 62500, while the sum is 36.

The square root of 551551545 is about 23485.1345535852. The cubic root of 551551545 is about 820.0909798914.

The spelling of 551551545 in words is "five hundred fifty-one million, five hundred fifty-one thousand, five hundred forty-five".