245635761221 has 8 divisors (see below), whose sum is σ = 258569755200. Its totient is φ = 232702346880.

The previous prime is 245635761181. The next prime is 245635761247. The reversal of 245635761221 is 122167536542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245635761221 - 2¹⁰ = 245635760197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245635761251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929141 + ... + 1163861.

It is an arithmetic number, because the mean of its divisors is an integer number (32321219400).

Almost surely, 2^245635761221 is an apocalyptic number.

It is an amenable number.

245635761221 is a deficient number, since it is larger than the sum of its proper divisors (12933993979).

245635761221 is a wasteful number, since it uses less digits than its factorization.

245635761221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289819.

The product of its digits is 604800, while the sum is 44.

The spelling of 245635761221 in words is "two hundred forty-five billion, six hundred thirty-five million, seven hundred sixty-one thousand, two hundred twenty-one".