1209078371568 has 40 divisors (see below), whose sum is σ = 3161084427648. Its totient is φ = 398170386112.

The previous prime is 1209078371561. The next prime is 1209078371593. The reversal of 1209078371568 is 8651738709021.

It is a happy number.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209078371561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151737780 + ... + 151745747.

Almost surely, 2^{1209078371568} is an apocalyptic number.

It is an amenable number.

1209078371568 is an abundant number, since it is smaller than the sum of its proper divisors (1952006056080).

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

1209078371568 is a wasteful number, since it uses less digits than its factorization.

1209078371568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303483621 (or 303483615 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 57.

The spelling of 1209078371568 in words is "one trillion, two hundred nine billion, seventy-eight million, three hundred seventy-one thousand, five hundred sixty-eight".