551645455 has 32 divisors (see below), whose sum is σ = 704692224. Its totient is φ = 413715456.

The previous prime is 551645429. The next prime is 551645467. The reversal of 551645455 is 554546155.

It is a cyclic number.

It is not a de Polignac number, because 551645455 - 2⁹ = 551644943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1562559 + ... + 1562911.

It is an arithmetic number, because the mean of its divisors is an integer number (22021632).

Almost surely, 2^551645455 is an apocalyptic number.

551645455 is a deficient number, since it is larger than the sum of its proper divisors (153046769).

551645455 is a wasteful number, since it uses less digits than its factorization.

551645455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615.

The product of its digits is 300000, while the sum is 40.

The square root of 551645455 is about 23487.1338183270. The cubic root of 551645455 is about 820.1375215514.

The spelling of 551645455 in words is "five hundred fifty-one million, six hundred forty-five thousand, four hundred fifty-five".