1965560988888 has 160 divisors (see below), whose sum is σ = 6398517945600. Its totient is φ = 552070323648.

The previous prime is 1965560988817. The next prime is 1965560988889. The reversal of 1965560988888 is 8888890655691.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965560988889) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3404620 + ... + 3939867.

It is an arithmetic number, because the mean of its divisors is an integer number (39990737160).

Almost surely, 2^{1965560988888} is an apocalyptic number.

1965560988888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1965560988888 is an abundant number, since it is smaller than the sum of its proper divisors (4432956956712).

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

1965560988888 is a wasteful number, since it uses less digits than its factorization.

1965560988888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7344571 (or 7344558 counting only the distinct ones).

The product of its (nonzero) digits is 2388787200, while the sum is 81.

The spelling of 1965560988888 in words is "one trillion, nine hundred sixty-five billion, five hundred sixty million, nine hundred eighty-eight thousand, eight hundred eighty-eight".