263022120223561 has 4 divisors (see below), whose sum is σ = 263024511726352. Its totient is φ = 263019728720772.

The previous prime is 263022120223537. The next prime is 263022120223619. The reversal of 263022120223561 is 165322021220362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 263022120223561 - 2¹¹ = 263022120221513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 263022120223561.

It is not an unprimeable number, because it can be changed into a prime (263022124223561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1195586415 + ... + 1195806388.

It is an arithmetic number, because the mean of its divisors is an integer number (65756127931588).

Almost surely, 2^{263022120223561} is an apocalyptic number.

It is an amenable number.

263022120223561 is a deficient number, since it is larger than the sum of its proper divisors (2391502791).

263022120223561 is a wasteful number, since it uses less digits than its factorization.

263022120223561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391502790.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 263022120223561 in words is "two hundred sixty-three trillion, twenty-two billion, one hundred twenty million, two hundred twenty-three thousand, five hundred sixty-one".