261065366052 has 24 divisors (see below), whose sum is σ = 609204357216. Its totient is φ = 87014383488.

The previous prime is 261065366041. The next prime is 261065366053. The reversal of 261065366052 is 250663560162.

It is a junction number, because it is equal to n+sod(n) for n = 261065365995 and 261065366013.

It is not an unprimeable number, because it can be changed into a prime (261065366053) 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, 777813 + ... + 1061660.

It is an arithmetic number, because the mean of its divisors is an integer number (25383514884).

Almost surely, 2^261065366052 is an apocalyptic number.

It is an amenable number.

261065366052 is an abundant number, since it is smaller than the sum of its proper divisors (348138991164).

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

261065366052 is a wasteful number, since it uses less digits than its factorization.

261065366052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851307 (or 1851305 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 261065366052 in words is "two hundred sixty-one billion, sixty-five million, three hundred sixty-six thousand, fifty-two".