198646367381 has 16 divisors (see below), whose sum is σ = 247673107968. Its totient is φ = 154783062000.

The previous prime is 198646367377. The next prime is 198646367383. The reversal of 198646367381 is 183763646891.

It is not a de Polignac number, because 198646367381 - 2² = 198646367377 is a prime.

It is a super-2 number, since 2×198646367381² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198646367383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2958326 + ... + 3024728.

It is an arithmetic number, because the mean of its divisors is an integer number (15479569248).

Almost surely, 2^198646367381 is an apocalyptic number.

198646367381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

198646367381 is a deficient number, since it is larger than the sum of its proper divisors (49026740587).

198646367381 is a wasteful number, since it uses less digits than its factorization.

198646367381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105272.

The product of its digits is 31352832, while the sum is 62.

The spelling of 198646367381 in words is "one hundred ninety-eight billion, six hundred forty-six million, three hundred sixty-seven thousand, three hundred eighty-one".