2018959651801 has 3 divisors (see below), whose sum is σ = 2018961072703. Its totient is φ = 2018958230900.

The previous prime is 2018959651783. The next prime is 2018959651829. The reversal of 2018959651801 is 1081569598102.

It is a happy number.

The square root of 2018959651801 is 1420901.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1509706147401 + 509253504400 = 1228701^2 + 713620^2 .

It is not a de Polignac number, because 2018959651801 - 2¹⁷ = 2018959520729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2018959651201) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 710451 + ... + 2131351.

Almost surely, 2^{2018959651801} is an apocalyptic number.

2018959651801 is the 1420901-st square number.

2018959651801 is the 710451-st centered octagonal number.

It is an amenable number.

2018959651801 is a deficient number, since it is larger than the sum of its proper divisors (1420902).

2018959651801 is an frugal number, since it uses more digits than its factorization.

2018959651801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2841802 (or 1420901 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 55.

The spelling of 2018959651801 in words is "two trillion, eighteen billion, nine hundred fifty-nine million, six hundred fifty-one thousand, eight hundred one".