4779521155221 has 8 divisors (see below), whose sum is σ = 6372714828480. Its totient is φ = 3186337459392.

The previous prime is 4779521155217. The next prime is 4779521155271. The reversal of 4779521155221 is 1225511259774.

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

It is not a de Polignac number, because 4779521155221 - 2² = 4779521155217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4779521155271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294105 + ... + 3351678.

It is an arithmetic number, because the mean of its divisors is an integer number (796589353560).

Almost surely, 2^{4779521155221} is an apocalyptic number.

It is an amenable number.

4779521155221 is a deficient number, since it is larger than the sum of its proper divisors (1593193673259).

4779521155221 is a wasteful number, since it uses less digits than its factorization.

4779521155221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4988715.

The product of its digits is 1764000, while the sum is 51.

The spelling of 4779521155221 in words is "four trillion, seven hundred seventy-nine billion, five hundred twenty-one million, one hundred fifty-five thousand, two hundred twenty-one".