197205377490 has 320 divisors, whose sum is σ = 603126881280. Its totient is φ = 45800640000.

The previous prime is 197205377489. The next prime is 197205377533. The reversal of 197205377490 is 94773502791.

197205377490 is a `hidden beast` number, since 19 + 7 + 2 + 0 + 537 + 7 + 4 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 27893676 + ... + 27900744.

It is an arithmetic number, because the mean of its divisors is an integer number (1884771504).

Almost surely, 2^197205377490 is an apocalyptic number.

197205377490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 197205377490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301563440640).

197205377490 is an abundant number, since it is smaller than the sum of its proper divisors (405921503790).

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

197205377490 is a wasteful number, since it uses less digits than its factorization.

197205377490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7231 (or 7222 counting only the distinct ones).

The product of its (nonzero) digits is 3333960, while the sum is 54.

The spelling of 197205377490 in words is "one hundred ninety-seven billion, two hundred five million, three hundred seventy-seven thousand, four hundred ninety".