1618678862644 has 24 divisors (see below), whose sum is σ = 2846606722400. Its totient is φ = 805363987680.

The previous prime is 1618678862623. The next prime is 1618678862651. The reversal of 1618678862644 is 4462688768161.

It is a self number, because there is not a number n which added to its sum of digits gives 1618678862644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4790047 + ... + 5116825.

Almost surely, 2^{1618678862644} is an apocalyptic number.

It is an amenable number.

1618678862644 is a deficient number, since it is larger than the sum of its proper divisors (1227927859756).

1618678862644 is a wasteful number, since it uses less digits than its factorization.

1618678862644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332863 (or 332861 counting only the distinct ones).

The product of its digits is 148635648, while the sum is 67.

The spelling of 1618678862644 in words is "one trillion, six hundred eighteen billion, six hundred seventy-eight million, eight hundred sixty-two thousand, six hundred forty-four".