551645725 has 6 divisors (see below), whose sum is σ = 684040730. Its totient is φ = 441316560.

The previous prime is 551645723. The next prime is 551645729. The reversal of 551645725 is 527546155.

It can be written as a sum of positive squares in 3 ways, for example, as 9966649 + 541679076 = 3157^2 + 23274^2 .

It is not a de Polignac number, because 551645725 - 2¹ = 551645723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551645723) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 11032890 + ... + 11032939.

Almost surely, 2^551645725 is an apocalyptic number.

It is an amenable number.

551645725 is a deficient number, since it is larger than the sum of its proper divisors (132395005).

551645725 is a wasteful number, since it uses less digits than its factorization.

551645725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22065839 (or 22065834 counting only the distinct ones).

The product of its digits is 210000, while the sum is 40.

The square root of 551645725 is about 23487.1395661541. The cubic root of 551645725 is about 820.1376553554.

The spelling of 551645725 in words is "five hundred fifty-one million, six hundred forty-five thousand, seven hundred twenty-five".