1099668919801 has 9 divisors (see below), whose sum is σ = 1118056846959. Its totient is φ = 1081578641400.

The previous prime is 1099668919759. The next prime is 1099668919813. The reversal of 1099668919801 is 1089198669901.

The square root of 1099668919801 is 1048651.

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., 35759188201 + 1063909731600 = 189101^2 + 1031460^2 .

It is not a de Polignac number, because 1099668919801 - 2¹³ = 1099668911609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1099668919861) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 63959116 + ... + 63976306.

It is an arithmetic number, because the mean of its divisors is an integer number (124228538551).

Almost surely, 2^{1099668919801} is an apocalyptic number.

1099668919801 is the 1048651-st square number.

1099668919801 is the 524326-th centered octagonal number.

It is an amenable number.

1099668919801 is a deficient number, since it is larger than the sum of its proper divisors (18387927158).

1099668919801 is an frugal number, since it uses more digits than its factorization.

1099668919801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34504 (or 17252 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 67.

The spelling of 1099668919801 in words is "one trillion, ninety-nine billion, six hundred sixty-eight million, nine hundred nineteen thousand, eight hundred one".