197422779645 has 288 divisors, whose sum is σ = 466917115392. Its totient is φ = 74988232704.

The previous prime is 197422779643. The next prime is 197422779683. The reversal of 197422779645 is 546977224791.

197422779645 is a `hidden beast` number, since 19 + 7 + 422 + 77 + 96 + 45 = 666.

It is not a de Polignac number, because 197422779645 - 2¹ = 197422779643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197422779643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 27215839 + ... + 27223091.

It is an arithmetic number, because the mean of its divisors is an integer number (1621239984).

Almost surely, 2^197422779645 is an apocalyptic number.

197422779645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197422779645 is an abundant number, since it is smaller than the sum of its proper divisors (269494335747).

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

197422779645 is a wasteful number, since it uses less digits than its factorization.

197422779645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7341 (or 7321 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 63.

The spelling of 197422779645 in words is "one hundred ninety-seven billion, four hundred twenty-two million, seven hundred seventy-nine thousand, six hundred forty-five".