197649807988 has 12 divisors (see below), whose sum is σ = 346147826752. Its totient is φ = 98750428920.

The previous prime is 197649807983. The next prime is 197649807991. The reversal of 197649807988 is 889708946791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197649807983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18612798 + ... + 18623413.

Almost surely, 2^197649807988 is an apocalyptic number.

It is an amenable number.

197649807988 is a deficient number, since it is larger than the sum of its proper divisors (148498018764).

197649807988 is a wasteful number, since it uses less digits than its factorization.

197649807988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37237542 (or 37237540 counting only the distinct ones).

The product of its (nonzero) digits is 438939648, while the sum is 76.

The spelling of 197649807988 in words is "one hundred ninety-seven billion, six hundred forty-nine million, eight hundred seven thousand, nine hundred eighty-eight".