1819803698001 has 63 divisors (see below), whose sum is σ = 2899382439211. Its totient is φ = 1141449102144.

The previous prime is 1819803697993. The next prime is 1819803698017. The reversal of 1819803698001 is 1008963089181.

The square root of 1819803698001 is 1349001.

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

1819803698001 is a `hidden beast` number, since 18 + 198 + 0 + 369 + 80 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1416802187025 + 403001510976 = 1190295^2 + 634824^2 .

It is not a de Polignac number, because 1819803698001 - 2³ = 1819803697993 is a prime.

It is a super-2 number, since 2×1819803698001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1819803698021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 619189990 + ... + 619192928.

Almost surely, 2^{1819803698001} is an apocalyptic number.

1819803698001 is the 1349001-st square number.

1819803698001 is the 674501-st centered octagonal number.

It is an amenable number.

1819803698001 is a deficient number, since it is larger than the sum of its proper divisors (1079578741210).

1819803698001 is an frugal number, since it uses more digits than its factorization.

1819803698001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5930 (or 2959 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The spelling of 1819803698001 in words is "one trillion, eight hundred nineteen billion, eight hundred three million, six hundred ninety-eight thousand, one".