220351987945 has 8 divisors (see below), whose sum is σ = 275919011136. Its totient is φ = 168617173296.

The previous prime is 220351987909. The next prime is 220351987957. The reversal of 220351987945 is 549789153022.

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

It is a cyclic number.

It is not a de Polignac number, because 220351987945 - 2⁹ = 220351987433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958052007 + ... + 958052236.

It is an arithmetic number, because the mean of its divisors is an integer number (34489876392).

Almost surely, 2^220351987945 is an apocalyptic number.

It is an amenable number.

220351987945 is a deficient number, since it is larger than the sum of its proper divisors (55567023191).

220351987945 is a wasteful number, since it uses less digits than its factorization.

220351987945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916104271.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 220351987945 in words is "two hundred twenty billion, three hundred fifty-one million, nine hundred eighty-seven thousand, nine hundred forty-five".