197249785920 has 1008 divisors, whose sum is σ = 811157168640. Its totient is φ = 43840051200.

The previous prime is 197249785919. The next prime is 197249785921. The reversal of 197249785920 is 29587942791.

197249785920 is a `hidden beast` number, since 1 + 9 + 72 + 497 + 8 + 59 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (197249785919) and next prime (197249785921).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197249785921) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6362896305 + ... + 6362896335.

Almost surely, 2^197249785920 is an apocalyptic number.

197249785920 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 197249785920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405578584320).

197249785920 is an abundant number, since it is smaller than the sum of its proper divisors (613907382720).

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

197249785920 is a wasteful number, since it uses less digits than its factorization.

197249785920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 197249785920 in words is "one hundred ninety-seven billion, two hundred forty-nine million, seven hundred eighty-five thousand, nine hundred twenty".