261008603535 has 16 divisors (see below), whose sum is σ = 418751686656. Its totient is φ = 138825281568.

The previous prime is 261008603509. The next prime is 261008603543. The reversal of 261008603535 is 535306800162.

It is not a de Polignac number, because 261008603535 - 2²³ = 261000214927 is a prime.

It is a super-2 number, since 2×261008603535² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261008603493 and 261008603502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23700999 + ... + 23712008.

It is an arithmetic number, because the mean of its divisors is an integer number (26171980416).

Almost surely, 2^261008603535 is an apocalyptic number.

261008603535 is a deficient number, since it is larger than the sum of its proper divisors (157743083121).

261008603535 is a wasteful number, since it uses less digits than its factorization.

261008603535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47413382.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 261008603535 in words is "two hundred sixty-one billion, eight million, six hundred three thousand, five hundred thirty-five".