261562731223016 has 16 divisors (see below), whose sum is σ = 490476833280000. Its totient is φ = 130768909015024.

The previous prime is 261562731222787. The next prime is 261562731223019. The reversal of 261562731223016 is 610322137265162.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (261562731223019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1556985320 + ... + 1557153303.

It is an arithmetic number, because the mean of its divisors is an integer number (30654802080000).

Almost surely, 2^{261562731223016} is an apocalyptic number.

It is an amenable number.

261562731223016 is a deficient number, since it is larger than the sum of its proper divisors (228914102056984).

261562731223016 is a wasteful number, since it uses less digits than its factorization.

261562731223016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114149128 (or 3114149124 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 47.

Adding to 261562731223016 its reverse (610322137265162), we get a palindrome (871884868488178).

The spelling of 261562731223016 in words is "two hundred sixty-one trillion, five hundred sixty-two billion, seven hundred thirty-one million, two hundred twenty-three thousand, sixteen".