197166651648 has 72 divisors (see below), whose sum is σ = 552369333600. Its totient is φ = 62263148544.

The previous prime is 197166651637. The next prime is 197166651697. The reversal of 197166651648 is 846156661791.

It is a super-2 number, since 2×197166651648² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 197166651591 and 197166651600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6741393 + ... + 6770576.

It is an arithmetic number, because the mean of its divisors is an integer number (7671796300).

Almost surely, 2^197166651648 is an apocalyptic number.

It is an amenable number.

197166651648 is an abundant number, since it is smaller than the sum of its proper divisors (355202681952).

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

197166651648 is a wasteful number, since it uses less digits than its factorization.

197166651648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13512007 (or 13511993 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 60.

The spelling of 197166651648 in words is "one hundred ninety-seven billion, one hundred sixty-six million, six hundred fifty-one thousand, six hundred forty-eight".