1198983390361 has 27 divisors (see below), whose sum is σ = 1242610903359. Its totient is φ = 1156878085968.

The previous prime is 1198983390301. The next prime is 1198983390401. The reversal of 1198983390361 is 1630933898911.

The square root of 1198983390361 is 1094981.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 206656614025 + 992326776336 = 454595^2 + 996156^2 .

It is not a de Polignac number, because 1198983390361 - 2⁷ = 1198983390233 is a prime.

It is a super-2 number, since 2×1198983390361² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1198983390361.

It is not an unprimeable number, because it can be changed into a prime (1198983390301) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4328459755 + ... + 4328460031.

Almost surely, 2^{1198983390361} is an apocalyptic number.

1198983390361 is the 1094981-st square number.

1198983390361 is the 547491-st centered octagonal number.

It is an amenable number.

1198983390361 is a deficient number, since it is larger than the sum of its proper divisors (43627512998).

1198983390361 is an frugal number, since it uses more digits than its factorization.

1198983390361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 61.

The spelling of 1198983390361 in words is "one trillion, one hundred ninety-eight billion, nine hundred eighty-three million, three hundred ninety thousand, three hundred sixty-one".