1618268940544 has 63 divisors (see below), whose sum is σ = 3307126435123. Its totient is φ = 790317389568.

The previous prime is 1618268940529. The next prime is 1618268940643. The reversal of 1618268940544 is 4450498628161.

The square root of 1618268940544 is 1272112.

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

It is a super-3 number, since 3×1618268940544³ (a number of 38 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 6 ways as a sum of consecutive naturals, for example, 37634161387 + ... + 37634161429.

Almost surely, 2^{1618268940544} is an apocalyptic number.

1618268940544 is the 1272112-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1618268940544

1618268940544 is an abundant number, since it is smaller than the sum of its proper divisors (1688857494579).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1618268940544 is an frugal number, since it uses more digits than its factorization.

1618268940544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 58.

The spelling of 1618268940544 in words is "one trillion, six hundred eighteen billion, two hundred sixty-eight million, nine hundred forty thousand, five hundred forty-four".