261472613355 has 80 divisors (see below), whose sum is σ = 479532350880. Its totient is φ = 136818160128.

The previous prime is 261472613351. The next prime is 261472613411. The reversal of 261472613355 is 553316274162.

261472613355 is a `hidden beast` number, since 2 + 614 + 7 + 26 + 1 + 3 + 3 + 5 + 5 = 666.

It is not a de Polignac number, because 261472613355 - 2² = 261472613351 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 261472613355.

It is not an unprimeable number, because it can be changed into a prime (261472613351) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5190931 + ... + 5241059.

It is an arithmetic number, because the mean of its divisors is an integer number (5994154386).

Almost surely, 2^261472613355 is an apocalyptic number.

261472613355 is a deficient number, since it is larger than the sum of its proper divisors (218059737525).

261472613355 is an frugal number, since it uses more digits than its factorization.

261472613355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50214 (or 50190 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The spelling of 261472613355 in words is "two hundred sixty-one billion, four hundred seventy-two million, six hundred thirteen thousand, three hundred fifty-five".