198218553136 has 10 divisors (see below), whose sum is σ = 384048446732. Its totient is φ = 99109276560.

The previous prime is 198218553131. The next prime is 198218553139. The reversal of 198218553136 is 631355812891.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (198218553131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6194329770 + ... + 6194329801.

Almost surely, 2^198218553136 is an apocalyptic number.

198218553136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

198218553136 is a deficient number, since it is larger than the sum of its proper divisors (185829893596).

198218553136 is a wasteful number, since it uses less digits than its factorization.

198218553136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12388659579 (or 12388659573 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 52.

The spelling of 198218553136 in words is "one hundred ninety-eight billion, two hundred eighteen million, five hundred fifty-three thousand, one hundred thirty-six".