89721770220 has 36 divisors (see below), whose sum is σ = 272156036880. Its totient is φ = 23925805344.

The previous prime is 89721770209. The next prime is 89721770231. The reversal of 89721770220 is 2207712798.

It is an interprime number because it is at equal distance from previous prime (89721770209) and next prime (89721770231).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 249226960 + ... + 249227319.

Almost surely, 2^89721770220 is an apocalyptic number.

It is an amenable number.

89721770220 is an abundant number, since it is smaller than the sum of its proper divisors (182434266660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

89721770220 is a wasteful number, since it uses less digits than its factorization.

89721770220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498454294 (or 498454289 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The spelling of 89721770220 in words is "eighty-nine billion, seven hundred twenty-one million, seven hundred seventy thousand, two hundred twenty".