1398291191842 has 4 divisors (see below), whose sum is σ = 2097436787766. Its totient is φ = 699145595920.

The previous prime is 1398291191839. The next prime is 1398291191887. The reversal of 1398291191842 is 2481911928931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1259133096321 + 139158095521 = 1122111^2 + 373039^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349572797959 + ... + 349572797962.

Almost surely, 2^{1398291191842} is an apocalyptic number.

1398291191842 is a deficient number, since it is larger than the sum of its proper divisors (699145595924).

1398291191842 is an equidigital number, since it uses as much as digits as its factorization.

1398291191842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699145595923.

The product of its digits is 2239488, while the sum is 58.

The spelling of 1398291191842 in words is "one trillion, three hundred ninety-eight billion, two hundred ninety-one million, one hundred ninety-one thousand, eight hundred forty-two".