1618398869448 has 16 divisors (see below), whose sum is σ = 4045997173680. Its totient is φ = 539466289808.

The previous prime is 1618398869447. The next prime is 1618398869489. The reversal of 1618398869448 is 8449688938161.

It is a self number, because there is not a number n which added to its sum of digits gives 1618398869448.

It is not an unprimeable number, because it can be changed into a prime (1618398869447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33716643090 + ... + 33716643137.

It is an arithmetic number, because the mean of its divisors is an integer number (252874823355).

Almost surely, 2^{1618398869448} is an apocalyptic number.

It is an amenable number.

1618398869448 is an abundant number, since it is smaller than the sum of its proper divisors (2427598304232).

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

1618398869448 is a wasteful number, since it uses less digits than its factorization.

1618398869448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67433286236 (or 67433286232 counting only the distinct ones).

The product of its digits is 573308928, while the sum is 75.

The spelling of 1618398869448 in words is "one trillion, six hundred eighteen billion, three hundred ninety-eight million, eight hundred sixty-nine thousand, four hundred forty-eight".