197222065920 has 864 divisors, whose sum is σ = 785859459840. Its totient is φ = 46952939520.

The previous prime is 197222065903. The next prime is 197222065969. The reversal of 197222065920 is 29560222791.

197222065920 is a `hidden beast` number, since 19 + 7 + 22 + 20 + 6 + 592 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 201864472 + ... + 201865448.

It is an arithmetic number, because the mean of its divisors is an integer number (909559560).

Almost surely, 2^197222065920 is an apocalyptic number.

197222065920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197222065920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392929729920).

197222065920 is an abundant number, since it is smaller than the sum of its proper divisors (588637393920).

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

197222065920 is an equidigital number, since it uses as much as digits as its factorization.

197222065920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083 (or 1057 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 197222065920 in words is "one hundred ninety-seven billion, two hundred twenty-two million, sixty-five thousand, nine hundred twenty".