219491392988 has 48 divisors (see below), whose sum is σ = 441857051328. Its totient is φ = 93453696000.

The previous prime is 219491392973. The next prime is 219491392997. The reversal of 219491392988 is 889293194912.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2802278 + ... + 2879538.

It is an arithmetic number, because the mean of its divisors is an integer number (9205355236).

Almost surely, 2^219491392988 is an apocalyptic number.

219491392988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

219491392988 is an abundant number, since it is smaller than the sum of its proper divisors (222365658340).

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

219491392988 is a wasteful number, since it uses less digits than its factorization.

219491392988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77934 (or 77932 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 65.

The spelling of 219491392988 in words is "two hundred nineteen billion, four hundred ninety-one million, three hundred ninety-two thousand, nine hundred eighty-eight".