1018698601636 has 27 divisors (see below), whose sum is σ = 1812645714243. Its totient is φ = 500938753920.

The previous prime is 1018698601631. The next prime is 1018698601747. The reversal of 1018698601636 is 6361068968101.

It is a happy number.

The square root of 1018698601636 is 1009306.

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

1018698601636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 106948620900 + 911749980736 = 327030^2 + 954856^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1018698601631) 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, 123131196 + ... + 123139468.

Almost surely, 2^{1018698601636} is an apocalyptic number.

1018698601636 is the 1009306-th square number.

It is an amenable number.

1018698601636 is a deficient number, since it is larger than the sum of its proper divisors (793947112607).

1018698601636 is an frugal number, since it uses more digits than its factorization.

1018698601636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16672 (or 8336 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 1018698601636 in words is "one trillion, eighteen billion, six hundred ninety-eight million, six hundred one thousand, six hundred thirty-six".