1098181914961 has 4 divisors (see below), whose sum is σ = 1100132505072. Its totient is φ = 1096231324852.

The previous prime is 1098181914959. The next prime is 1098181914971. The reversal of 1098181914961 is 1694191818901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1098181914961 - 2¹ = 1098181914959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1098181914896 and 1098181914905.

It is not an unprimeable number, because it can be changed into a prime (1098181914931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 975294211 + ... + 975295336.

It is an arithmetic number, because the mean of its divisors is an integer number (275033126268).

Almost surely, 2^{1098181914961} is an apocalyptic number.

It is an amenable number.

1098181914961 is a deficient number, since it is larger than the sum of its proper divisors (1950590111).

1098181914961 is an equidigital number, since it uses as much as digits as its factorization.

1098181914961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950590110.

The product of its (nonzero) digits is 1119744, while the sum is 58.

The spelling of 1098181914961 in words is "one trillion, ninety-eight billion, one hundred eighty-one million, nine hundred fourteen thousand, nine hundred sixty-one".