220781454002 has 6 divisors (see below), whose sum is σ = 331173177759. Its totient is φ = 110390394750.

The previous prime is 220781453987. The next prime is 220781454011. The reversal of 220781454002 is 200454187022.

It can be written as a sum of positive squares in only one way, i.e., 110390727001 + 110390727001 = 332251^2 + 332251^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332251.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 498377 + ... + 830627.

Almost surely, 2^220781454002 is an apocalyptic number.

220781454002 is a deficient number, since it is larger than the sum of its proper divisors (110391723757).

220781454002 is an frugal number, since it uses more digits than its factorization.

220781454002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664504 (or 332253 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 35.

The spelling of 220781454002 in words is "two hundred twenty billion, seven hundred eighty-one million, four hundred fifty-four thousand, two".