198729404520 has 64 divisors (see below), whose sum is σ = 596732080320. Its totient is φ = 52946164224.

The previous prime is 198729404513. The next prime is 198729404591. The reversal of 198729404520 is 25404927891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 623182 + ... + 886461.

It is an arithmetic number, because the mean of its divisors is an integer number (9323938755).

Almost surely, 2^198729404520 is an apocalyptic number.

198729404520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198729404520 is an abundant number, since it is smaller than the sum of its proper divisors (398002675800).

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

198729404520 is a wasteful number, since it uses less digits than its factorization.

198729404520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510754 (or 1510750 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 198729404520 in words is "one hundred ninety-eight billion, seven hundred twenty-nine million, four hundred four thousand, five hundred twenty".