261536036 has 48 divisors (see below), whose sum is σ = 502467840. Its totient is φ = 118715520.

The previous prime is 261536021. The next prime is 261536039. The reversal of 261536036 is 630635162.

It is a junction number, because it is equal to n+sod(n) for n = 261535993 and 261536011.

It is not an unprimeable number, because it can be changed into a prime (261536039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161945 + ... + 163551.

It is an arithmetic number, because the mean of its divisors is an integer number (10468080).

Almost surely, 2^261536036 is an apocalyptic number.

It is an amenable number.

261536036 is a deficient number, since it is larger than the sum of its proper divisors (240931804).

261536036 is a wasteful number, since it uses less digits than its factorization.

261536036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724 (or 1722 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 261536036 is about 16172.0758098644. The cubic root of 261536036 is about 639.5048546526.

The spelling of 261536036 in words is "two hundred sixty-one million, five hundred thirty-six thousand, thirty-six".