197064655550 has 48 divisors (see below), whose sum is σ = 433348112160. Its totient is φ = 65235192960.

The previous prime is 197064655511. The next prime is 197064655589. The reversal of 197064655550 is 55556460791.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (197064655511) and next prime (197064655589).

It is a junction number, because it is equal to n+sod(n) for n = 197064655492 and 197064655501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9697469 + ... + 9717768.

It is an arithmetic number, because the mean of its divisors is an integer number (9028085670).

Almost surely, 2^197064655550 is an apocalyptic number.

197064655550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197064655550 is an abundant number, since it is smaller than the sum of its proper divisors (236283456610).

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

197064655550 is a wasteful number, since it uses less digits than its factorization.

197064655550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19415285 (or 19415280 counting only the distinct ones).

The product of its (nonzero) digits is 5670000, while the sum is 53.

The spelling of 197064655550 in words is "one hundred ninety-seven billion, sixty-four million, six hundred fifty-five thousand, five hundred fifty".