261675142420635 has 96 divisors (see below), whose sum is σ = 490830154633728. Its totient is φ = 133489478580480.

The previous prime is 261675142420607. The next prime is 261675142420639. The reversal of 261675142420635 is 536024241576162.

It is a happy number.

261675142420635 is a `hidden beast` number, since 2 + 6 + 1 + 6 + 7 + 5 + 1 + 424 + 206 + 3 + 5 = 666.

It is not a de Polignac number, because 261675142420635 - 2⁷ = 261675142420507 is a prime.

It is a super-2 number, since 2×261675142420635² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261675142420639) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2494681540 + ... + 2494786430.

It is an arithmetic number, because the mean of its divisors is an integer number (5112814110768).

Almost surely, 2^{261675142420635} is an apocalyptic number.

261675142420635 is a deficient number, since it is larger than the sum of its proper divisors (229155012213093).

261675142420635 is a wasteful number, since it uses less digits than its factorization.

261675142420635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194207 (or 194195 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 54.

Adding to 261675142420635 its reverse (536024241576162), we get a palindrome (797699383996797).

The spelling of 261675142420635 in words is "two hundred sixty-one trillion, six hundred seventy-five billion, one hundred forty-two million, four hundred twenty thousand, six hundred thirty-five".