551655765 has 40 divisors (see below), whose sum is σ = 1000869408. Its totient is φ = 290653920.

The previous prime is 551655739. The next prime is 551655773. The reversal of 551655765 is 567556155.

It is not a de Polignac number, because 551655765 - 2¹⁶ = 551590229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 551655765.

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 39 ways as a sum of consecutive naturals, for example, 25410 + ... + 41820.

Almost surely, 2^551655765 is an apocalyptic number.

It is an amenable number.

551655765 is a deficient number, since it is larger than the sum of its proper divisors (449213643).

551655765 is a wasteful number, since it uses less digits than its factorization.

551655765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16511 (or 16502 counting only the distinct ones).

The product of its digits is 787500, while the sum is 45.

The square root of 551655765 is about 23487.3532991693. The cubic root of 551655765 is about 820.1426308507.

The spelling of 551655765 in words is "five hundred fifty-one million, six hundred fifty-five thousand, seven hundred sixty-five".