261040737131 has 8 divisors (see below), whose sum is σ = 272151293040. Its totient is φ = 250159264992.

The previous prime is 261040737121. The next prime is 261040737137. The reversal of 261040737131 is 131737040162.

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 261040737131 - 2³⁴ = 243860867947 is a prime.

It is a super-2 number, since 2×261040737131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261040737091 and 261040737100.

It is not an unprimeable number, because it can be changed into a prime (261040737137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57268616 + ... + 57273173.

It is an arithmetic number, because the mean of its divisors is an integer number (34018911630).

Almost surely, 2^261040737131 is an apocalyptic number.

261040737131 is a deficient number, since it is larger than the sum of its proper divisors (11110555909).

261040737131 is a wasteful number, since it uses less digits than its factorization.

261040737131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114541885.

The product of its (nonzero) digits is 21168, while the sum is 35.

Adding to 261040737131 its reverse (131737040162), we get a palindrome (392777777293).

The spelling of 261040737131 in words is "two hundred sixty-one billion, forty million, seven hundred thirty-seven thousand, one hundred thirty-one".