1118781716664 has 32 divisors (see below), whose sum is σ = 2856463960320. Its totient is φ = 364992616416.

The previous prime is 1118781716609. The next prime is 1118781716671. The reversal of 1118781716664 is 4666171878111.

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, 495912754 + ... + 495915009.

It is an arithmetic number, because the mean of its divisors is an integer number (89264498760).

Almost surely, 2^{1118781716664} is an apocalyptic number.

It is an amenable number.

1118781716664 is an abundant number, since it is smaller than the sum of its proper divisors (1737682243656).

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

1118781716664 is a wasteful number, since it uses less digits than its factorization.

1118781716664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991827819 (or 991827815 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 57.

The spelling of 1118781716664 in words is "one trillion, one hundred eighteen billion, seven hundred eighty-one million, seven hundred sixteen thousand, six hundred sixty-four".