220012640403665 has 32 divisors (see below), whose sum is σ = 286840136126880. Its totient is φ = 161347258368000.

The previous prime is 220012640403613. The next prime is 220012640403781. The reversal of 220012640403665 is 566304046210022.

It can be written as a sum of positive squares in 16 ways, for example, as 27868020486289 + 192144619917376 = 5279017^2 + 13861624^2 .

It is not a de Polignac number, because 220012640403665 - 2⁶ = 220012640403601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50427410 + ... + 54616379.

It is an arithmetic number, because the mean of its divisors is an integer number (8963754253965).

Almost surely, 2^{220012640403665} is an apocalyptic number.

It is an amenable number.

220012640403665 is a deficient number, since it is larger than the sum of its proper divisors (66827495723215).

220012640403665 is a wasteful number, since it uses less digits than its factorization.

220012640403665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105044453.

The product of its (nonzero) digits is 414720, while the sum is 41.

Adding to 220012640403665 its reverse (566304046210022), we get a palindrome (786316686613687).

The spelling of 220012640403665 in words is "two hundred twenty trillion, twelve billion, six hundred forty million, four hundred three thousand, six hundred sixty-five".