551436642 has 24 divisors (see below), whose sum is σ = 1199103516. Its totient is φ = 183146976.

The previous prime is 551436637. The next prime is 551436647. The reversal of 551436642 is 246634155.

551436642 is a `hidden beast` number, since 5 + 5 + 1 + 4 + 3 + 6 + 642 = 666.

It is an interprime number because it is at equal distance from previous prime (551436637) and next prime (551436647).

It can be written as a sum of positive squares in 2 ways, for example, as 548543241 + 2893401 = 23421^2 + 1701^2 .

It is a junction number, because it is equal to n+sod(n) for n = 551436597 and 551436606.

It is not an unprimeable number, because it can be changed into a prime (551436647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50313 + ... + 60284.

Almost surely, 2^551436642 is an apocalyptic number.

551436642 is an abundant number, since it is smaller than the sum of its proper divisors (647666874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551436642 is a wasteful number, since it uses less digits than its factorization.

551436642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110882 (or 110879 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 551436642 is about 23482.6881340276. The cubic root of 551436642 is about 820.0340269441.

The spelling of 551436642 in words is "five hundred fifty-one million, four hundred thirty-six thousand, six hundred forty-two".