261675256367573 has 8 divisors (see below), whose sum is σ = 277068076791192. Its totient is φ = 246282453531136.

The previous prime is 261675256367563. The next prime is 261675256367663. The reversal of 261675256367573 is 375763652576162.

It can be written as a sum of positive squares in 4 ways, for example, as 57797352436849 + 203877903930724 = 7602457^2 + 14278582^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261675256367573 - 2²⁸ = 261674987932117 is a prime.

It is a super-3 number, since 3×261675256367573³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261675256367497 and 261675256367506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261675256367563) 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, 37814561 + ... + 44196057.

It is an arithmetic number, because the mean of its divisors is an integer number (34633509598899).

Almost surely, 2^{261675256367573} is an apocalyptic number.

It is an amenable number.

261675256367573 is a deficient number, since it is larger than the sum of its proper divisors (15392820423619).

261675256367573 is a wasteful number, since it uses less digits than its factorization.

261675256367573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8793591.

The product of its digits is 2000376000, while the sum is 71.

The spelling of 261675256367573 in words is "two hundred sixty-one trillion, six hundred seventy-five billion, two hundred fifty-six million, three hundred sixty-seven thousand, five hundred seventy-three".