220661550554 has 16 divisors (see below), whose sum is σ = 343099100160. Its totient is φ = 106324967280.

The previous prime is 220661550547. The next prime is 220661550559. The reversal of 220661550554 is 455055166022.

It is not an unprimeable number, because it can be changed into a prime (220661550559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7430909 + ... + 7460544.

It is an arithmetic number, because the mean of its divisors is an integer number (21443693760).

Almost surely, 2^220661550554 is an apocalyptic number.

220661550554 is a deficient number, since it is larger than the sum of its proper divisors (122437549606).

220661550554 is a wasteful number, since it uses less digits than its factorization.

220661550554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14891725.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 220661550554 in words is "two hundred twenty billion, six hundred sixty-one million, five hundred fifty thousand, five hundred fifty-four".