261535060773253 has 4 divisors (see below), whose sum is σ = 261703902001900. Its totient is φ = 261366219544608.

The previous prime is 261535060773209. The next prime is 261535060773271. The reversal of 261535060773253 is 352377060535162.

261535060773253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 152537764981924 + 108997295791329 = 12350618^2 + 10440177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261535060773253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261535060773194 and 261535060773203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261535060773293) 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, 84420612000 + ... + 84420615097.

It is an arithmetic number, because the mean of its divisors is an integer number (65425975500475).

Almost surely, 2^{261535060773253} is an apocalyptic number.

It is an amenable number.

261535060773253 is a deficient number, since it is larger than the sum of its proper divisors (168841228647).

261535060773253 is a wasteful number, since it uses less digits than its factorization.

261535060773253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168841228646.

The product of its (nonzero) digits is 23814000, while the sum is 55.

The spelling of 261535060773253 in words is "two hundred sixty-one trillion, five hundred thirty-five billion, sixty million, seven hundred seventy-three thousand, two hundred fifty-three".