198153540730 has 8 divisors (see below), whose sum is σ = 356676373332. Its totient is φ = 79261416288.

The previous prime is 198153540713. The next prime is 198153540743. The reversal of 198153540730 is 37045351891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 167307995089 + 30845545641 = 409033^2 + 175629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9907677027 + ... + 9907677046.

Almost surely, 2^198153540730 is an apocalyptic number.

198153540730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198153540730 is a deficient number, since it is larger than the sum of its proper divisors (158522832602).

198153540730 is a wasteful number, since it uses less digits than its factorization.

198153540730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19815354080.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 198153540730 in words is "one hundred ninety-eight billion, one hundred fifty-three million, five hundred forty thousand, seven hundred thirty".