1976768809728 has 144 divisors (see below), whose sum is σ = 5394110047872. Its totient is φ = 642290688000.

The previous prime is 1976768809679. The next prime is 1976768809733. The reversal of 1976768809728 is 8279088676791.

It is a super-2 number, since 2×1976768809728² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36845643 + ... + 36899253.

Almost surely, 2^{1976768809728} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1976768809728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2697055023936).

1976768809728 is an abundant number, since it is smaller than the sum of its proper divisors (3417341238144).

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

1976768809728 is a wasteful number, since it uses less digits than its factorization.

1976768809728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54842 (or 54828 counting only the distinct ones).

The product of its (nonzero) digits is 1024192512, while the sum is 78.

The spelling of 1976768809728 in words is "one trillion, nine hundred seventy-six billion, seven hundred sixty-eight million, eight hundred nine thousand, seven hundred twenty-eight".