261045612 has 24 divisors (see below), whose sum is σ = 676785200. Its totient is φ = 87015168.

The previous prime is 261045611. The next prime is 261045623. The reversal of 261045612 is 216540162.

261045612 is a `hidden beast` number, since 2 + 6 + 1 + 0 + 45 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (261045611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1208437 + ... + 1208652.

Almost surely, 2^261045612 is an apocalyptic number.

It is an amenable number.

261045612 is an abundant number, since it is smaller than the sum of its proper divisors (415739588).

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

261045612 is a wasteful number, since it uses less digits than its factorization.

261045612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417102 (or 2417094 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 261045612 is about 16156.9060156950. The cubic root of 261045612 is about 639.1048781987.

Adding to 261045612 its reverse (216540162), we get a palindrome (477585774).

The spelling of 261045612 in words is "two hundred sixty-one million, forty-five thousand, six hundred twelve".