261148626 has 12 divisors (see below), whose sum is σ = 565822062. Its totient is φ = 87049536.

The previous prime is 261148621. The next prime is 261148633. The reversal of 261148626 is 626841162.

261148626 is a `hidden beast` number, since 26 + 1 + 1 + 4 + 8 + 626 = 666.

It can be written as a sum of positive squares in only one way, i.e., 259049025 + 2099601 = 16095^2 + 1449^2 .

It is not an unprimeable number, because it can be changed into a prime (261148621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7254111 + ... + 7254146.

Almost surely, 2^261148626 is an apocalyptic number.

261148626 is an abundant number, since it is smaller than the sum of its proper divisors (304673436).

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

261148626 is a wasteful number, since it uses less digits than its factorization.

261148626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14508265 (or 14508262 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 261148626 is about 16160.0936259664. The cubic root of 261148626 is about 639.1889351459.

Adding to 261148626 its reverse (626841162), we get a palindrome (887989788).

The spelling of 261148626 in words is "two hundred sixty-one million, one hundred forty-eight thousand, six hundred twenty-six".