261514645353297 has 24 divisors (see below), whose sum is σ = 446593154629440. Its totient is φ = 144283942262880.

The previous prime is 261514645353287. The next prime is 261514645353317. The reversal of 261514645353297 is 792353546415162.

261514645353297 is a `hidden beast` number, since 2 + 6 + 1 + 5 + 1 + 4 + 6 + 4 + 5 + 3 + 532 + 97 = 666.

It is not a de Polignac number, because 261514645353297 - 2¹⁰ = 261514645352273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (261514645353287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71569413979 + ... + 71569417632.

It is an arithmetic number, because the mean of its divisors is an integer number (18608048109560).

Almost surely, 2^{261514645353297} is an apocalyptic number.

It is an amenable number.

261514645353297 is a deficient number, since it is larger than the sum of its proper divisors (185078509276143).

261514645353297 is a wasteful number, since it uses less digits than its factorization.

261514645353297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143138831653 (or 143138831650 counting only the distinct ones).

The product of its digits is 163296000, while the sum is 63.

The spelling of 261514645353297 in words is "two hundred sixty-one trillion, five hundred fourteen billion, six hundred forty-five million, three hundred fifty-three thousand, two hundred ninety-seven".