261562731530236 has 12 divisors (see below), whose sum is σ = 458387754191640. Its totient is φ = 130594801761200.

The previous prime is 261562731530207. The next prime is 261562731530249. The reversal of 261562731530236 is 632035137265162.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46640997826 + ... + 46641003433.

It is an arithmetic number, because the mean of its divisors is an integer number (38198979515970).

Almost surely, 2^{261562731530236} is an apocalyptic number.

It is an amenable number.

261562731530236 is a deficient number, since it is larger than the sum of its proper divisors (196825022661404).

261562731530236 is a wasteful number, since it uses less digits than its factorization.

261562731530236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93282001964 (or 93282001962 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 52.

Adding to 261562731530236 its reverse (632035137265162), we get a palindrome (893597868795398).

The spelling of 261562731530236 in words is "two hundred sixty-one trillion, five hundred sixty-two billion, seven hundred thirty-one million, five hundred thirty thousand, two hundred thirty-six".