261063021063 has 16 divisors (see below), whose sum is σ = 374934220416. Its totient is φ = 160622239200.

The previous prime is 261063020989. The next prime is 261063021101. The reversal of 261063021063 is 360120360162.

It is not a de Polignac number, because 261063021063 - 2²⁸ = 260794585607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261063021063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261063021563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465645 + ... + 859622.

It is an arithmetic number, because the mean of its divisors is an integer number (23433388776).

Almost surely, 2^261063021063 is an apocalyptic number.

261063021063 is a deficient number, since it is larger than the sum of its proper divisors (113871199353).

261063021063 is a wasteful number, since it uses less digits than its factorization.

261063021063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330334.

The product of its (nonzero) digits is 7776, while the sum is 30.

The spelling of 261063021063 in words is "two hundred sixty-one billion, sixty-three million, twenty-one thousand, sixty-three".