220638381584 has 10 divisors (see below), whose sum is σ = 427486864350. Its totient is φ = 110319190784.

The previous prime is 220638381577. The next prime is 220638381617. The reversal of 220638381584 is 485183836022.

It can be written as a sum of positive squares in only one way, i.e., 141204595984 + 79433785600 = 375772^2 + 281840^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6894949409 + ... + 6894949440.

It is an arithmetic number, because the mean of its divisors is an integer number (42748686435).

Almost surely, 2^220638381584 is an apocalyptic number.

It is an amenable number.

220638381584 is a deficient number, since it is larger than the sum of its proper divisors (206848482766).

220638381584 is a wasteful number, since it uses less digits than its factorization.

220638381584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13789898857 (or 13789898851 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 50.

The spelling of 220638381584 in words is "two hundred twenty billion, six hundred thirty-eight million, three hundred eighty-one thousand, five hundred eighty-four".