1618768894625 has 64 divisors (see below), whose sum is σ = 2174779376640. Its totient is φ = 1199104300800.

The previous prime is 1618768894583. The next prime is 1618768894637. The reversal of 1618768894625 is 5264988678161.

It is a de Polignac number, because none of the positive numbers 2^k-1618768894625 is a prime.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 84490547 + ... + 84509703.

It is an arithmetic number, because the mean of its divisors is an integer number (33980927760).

Almost surely, 2^{1618768894625} is an apocalyptic number.

It is an amenable number.

1618768894625 is a deficient number, since it is larger than the sum of its proper divisors (556010482015).

1618768894625 is a wasteful number, since it uses less digits than its factorization.

1618768894625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19995 (or 19985 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 71.

The spelling of 1618768894625 in words is "one trillion, six hundred eighteen billion, seven hundred sixty-eight million, eight hundred ninety-four thousand, six hundred twenty-five".