80578775765781 has 12 divisors (see below), whose sum is σ = 122517436837120. Its totient is φ = 50891858378280.

The previous prime is 80578775765779. The next prime is 80578775765797. The reversal of 80578775765781 is 18756757787508.

It is not a de Polignac number, because 80578775765781 - 2¹ = 80578775765779 is a prime.

It is a super-2 number, since 2×80578775765781² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80578775765781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80578775765731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235610455285 + ... + 235610455626.

Almost surely, 2^{80578775765781} is an apocalyptic number.

It is an amenable number.

80578775765781 is a deficient number, since it is larger than the sum of its proper divisors (41938661071339).

80578775765781 is a wasteful number, since it uses less digits than its factorization.

80578775765781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471220910936 (or 471220910933 counting only the distinct ones).

The product of its (nonzero) digits is 6453888000, while the sum is 81.

The spelling of 80578775765781 in words is "eighty trillion, five hundred seventy-eight billion, seven hundred seventy-five million, seven hundred sixty-five thousand, seven hundred eighty-one".