197530649540 has 24 divisors (see below), whose sum is σ = 474073559232. Its totient is φ = 67724794080.

The previous prime is 197530649531. The next prime is 197530649543. The reversal of 197530649540 is 45946035791.

It is not an unprimeable number, because it can be changed into a prime (197530649543) 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 7 ways as a sum of consecutive naturals, for example, 705466466 + ... + 705466745.

It is an arithmetic number, because the mean of its divisors is an integer number (19753064968).

Almost surely, 2^197530649540 is an apocalyptic number.

197530649540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197530649540 is an abundant number, since it is smaller than the sum of its proper divisors (276542909692).

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

197530649540 is a wasteful number, since it uses less digits than its factorization.

197530649540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410933227 (or 1410933225 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 53.

The spelling of 197530649540 in words is "one hundred ninety-seven billion, five hundred thirty million, six hundred forty-nine thousand, five hundred forty".