261361036 has 24 divisors (see below), whose sum is σ = 482010480. Its totient is φ = 123659712.

The previous prime is 261361013. The next prime is 261361069. The reversal of 261361036 is 630163162.

It is a super-2 number, since 2×261361036² = 136619182277986592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261360995 and 261361013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95706 + ... + 98398.

It is an arithmetic number, because the mean of its divisors is an integer number (20083770).

Almost surely, 2^261361036 is an apocalyptic number.

It is an amenable number.

261361036 is a deficient number, since it is larger than the sum of its proper divisors (220649444).

261361036 is a wasteful number, since it uses less digits than its factorization.

261361036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993 (or 3991 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 261361036 is about 16166.6643436424. The cubic root of 261361036 is about 639.3621868430.

It can be divided in two parts, 26136 and 1036, that added together give a palindrome (27172).

The spelling of 261361036 in words is "two hundred sixty-one million, three hundred sixty-one thousand, thirty-six".