261535126577463 has 12 divisors (see below), whose sum is σ = 399994899471648. Its totient is φ = 164100471577920.

The previous prime is 261535126577407. The next prime is 261535126577477. The reversal of 261535126577463 is 364775621535162.

261535126577463 is a `hidden beast` number, since 2 + 6 + 1 + 5 + 3 + 5 + 12 + 6 + 577 + 46 + 3 = 666.

It is not a de Polignac number, because 261535126577463 - 2¹² = 261535126573367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261535126577463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261535126572463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 854689955983 + ... + 854689956288.

It is an arithmetic number, because the mean of its divisors is an integer number (33332908289304).

Almost surely, 2^{261535126577463} is an apocalyptic number.

261535126577463 is a deficient number, since it is larger than the sum of its proper divisors (138459772894185).

261535126577463 is a wasteful number, since it uses less digits than its factorization.

261535126577463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709379912294 (or 1709379912291 counting only the distinct ones).

The product of its digits is 190512000, while the sum is 63.

The spelling of 261535126577463 in words is "two hundred sixty-one trillion, five hundred thirty-five billion, one hundred twenty-six million, five hundred seventy-seven thousand, four hundred sixty-three".