1998377268826 has 8 divisors (see below), whose sum is σ = 3100930244820. Its totient is φ = 964733853888.

The previous prime is 1998377268809. The next prime is 1998377268847. The reversal of 1998377268826 is 6288627738991.

It can be written as a sum of positive squares in 2 ways, for example, as 1996289235801 + 2088033025 = 1412901^2 + 45695^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17227390191 + ... + 17227390306.

Almost surely, 2^{1998377268826} is an apocalyptic number.

1998377268826 is a deficient number, since it is larger than the sum of its proper divisors (1102552975994).

1998377268826 is a wasteful number, since it uses less digits than its factorization.

1998377268826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34454780528.

The product of its digits is 877879296, while the sum is 76.

The spelling of 1998377268826 in words is "one trillion, nine hundred ninety-eight billion, three hundred seventy-seven million, two hundred sixty-eight thousand, eight hundred twenty-six".