261061036 has 12 divisors (see below), whose sum is σ = 463291920. Its totient is φ = 128691920.

The previous prime is 261061001. The next prime is 261061039. The reversal of 261061036 is 630160162.

It is a self number, because there is not a number n which added to its sum of digits gives 261061036.

It is not an unprimeable number, because it can be changed into a prime (261061039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459331 + ... + 459898.

It is an arithmetic number, because the mean of its divisors is an integer number (38607660).

Almost surely, 2^261061036 is an apocalyptic number.

It is an amenable number.

261061036 is a deficient number, since it is larger than the sum of its proper divisors (202230884).

261061036 is a wasteful number, since it uses less digits than its factorization.

261061036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919304 (or 919302 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 261061036 is about 16157.3833277545. The cubic root of 261061036 is about 639.1174652193.

The spelling of 261061036 in words is "two hundred sixty-one million, sixty-one thousand, thirty-six".