261535909126892 has 6 divisors (see below), whose sum is σ = 457687840972068. Its totient is φ = 130767954563444.

The previous prime is 261535909126879. The next prime is 261535909126897. The reversal of 261535909126892 is 298621909535162.

It is not an unprimeable number, because it can be changed into a prime (261535909126897) by changing a digit.

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 as a sum of consecutive naturals, namely, 32691988640858 + ... + 32691988640865.

It is an arithmetic number, because the mean of its divisors is an integer number (76281306828678).

Almost surely, 2^{261535909126892} is an apocalyptic number.

It is an amenable number.

261535909126892 is a deficient number, since it is larger than the sum of its proper divisors (196151931845176).

261535909126892 is a wasteful number, since it uses less digits than its factorization.

261535909126892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65383977281727 (or 65383977281725 counting only the distinct ones).

The product of its (nonzero) digits is 125971200, while the sum is 68.

The spelling of 261535909126892 in words is "two hundred sixty-one trillion, five hundred thirty-five billion, nine hundred nine million, one hundred twenty-six thousand, eight hundred ninety-two".