197790421452 has 24 divisors (see below), whose sum is σ = 497011828656. Its totient is φ = 60858591168.

The previous prime is 197790421429. The next prime is 197790421453. The reversal of 197790421452 is 254124097791.

197790421452 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 197790421395 and 197790421404.

It is not an unprimeable number, because it can be changed into a prime (197790421453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633943503 + ... + 633943814.

It is an arithmetic number, because the mean of its divisors is an integer number (20708826194).

Almost surely, 2^197790421452 is an apocalyptic number.

197790421452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

197790421452 is an abundant number, since it is smaller than the sum of its proper divisors (299221407204).

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

197790421452 is a wasteful number, since it uses less digits than its factorization.

197790421452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267887337 (or 1267887335 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 197790421452 in words is "one hundred ninety-seven billion, seven hundred ninety million, four hundred twenty-one thousand, four hundred fifty-two".