197558552550 has 24 divisors (see below), whose sum is σ = 489945210696. Its totient is φ = 52682280640.

The previous prime is 197558552539. The next prime is 197558552551. The reversal of 197558552550 is 55255855791.

It is a super-2 number, since 2×197558552550² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197558552551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 658528359 + ... + 658528658.

It is an arithmetic number, because the mean of its divisors is an integer number (20414383779).

Almost surely, 2^197558552550 is an apocalyptic number.

197558552550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197558552550 is an abundant number, since it is smaller than the sum of its proper divisors (292386658146).

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

197558552550 is a wasteful number, since it uses less digits than its factorization.

197558552550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317057032 (or 1317057027 counting only the distinct ones).

The product of its (nonzero) digits is 15750000, while the sum is 57.

The spelling of 197558552550 in words is "one hundred ninety-seven billion, five hundred fifty-eight million, five hundred fifty-two thousand, five hundred fifty".