197029905678550 has 48 divisors (see below), whose sum is σ = 422743577679360. Its totient is φ = 66921773024160.

The previous prime is 197029905678539. The next prime is 197029905678589. The reversal of 197029905678550 is 55876509920791.

It is a Smith number, since the sum of its digits (73) coincides with the sum of the digits of its prime factors.

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, 2630535390 + ... + 2630610289.

It is an arithmetic number, because the mean of its divisors is an integer number (8807157868320).

Almost surely, 2^{197029905678550} is an apocalyptic number.

197029905678550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197029905678550 is an abundant number, since it is smaller than the sum of its proper divisors (225713672000810).

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

197029905678550 is a wasteful number, since it uses less digits than its factorization.

197029905678550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5261145805 (or 5261145800 counting only the distinct ones).

The product of its (nonzero) digits is 428652000, while the sum is 73.

The spelling of 197029905678550 in words is "one hundred ninety-seven trillion, twenty-nine billion, nine hundred five million, six hundred seventy-eight thousand, five hundred fifty".