261600552 has 48 divisors (see below), whose sum is σ = 709312500. Its totient is φ = 87100416.

The previous prime is 261600529. The next prime is 261600553. The reversal of 261600552 is 255006162.

261600552 is a `hidden beast` number, since 2 + 6 + 1 + 600 + 5 + 52 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 254913156 + 6687396 = 15966^2 + 2586^2 .

It is not an unprimeable number, because it can be changed into a prime (261600553) 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, 88474 + ... + 91382.

Almost surely, 2^261600552 is an apocalyptic number.

It is an amenable number.

261600552 is an abundant number, since it is smaller than the sum of its proper divisors (447711948).

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

261600552 is a wasteful number, since it uses less digits than its factorization.

261600552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170 (or 4163 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 261600552 is about 16174.0703596837. The cubic root of 261600552 is about 639.5574349187.

The spelling of 261600552 in words is "two hundred sixty-one million, six hundred thousand, five hundred fifty-two".