219981872772 has 36 divisors (see below), whose sum is σ = 563104097920. Its totient is φ = 72399096432.

The previous prime is 219981872767. The next prime is 219981872779. The reversal of 219981872772 is 277278189912.

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

It is not an unprimeable number, because it can be changed into a prime (219981872779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38671888 + ... + 38677575.

Almost surely, 2^219981872772 is an apocalyptic number.

It is an amenable number.

219981872772 is an abundant number, since it is smaller than the sum of its proper divisors (343122225148).

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

219981872772 is a wasteful number, since it uses less digits than its factorization.

219981872772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77349552 (or 77349547 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 63.

The spelling of 219981872772 in words is "two hundred nineteen billion, nine hundred eighty-one million, eight hundred seventy-two thousand, seven hundred seventy-two".