80078141781 has 64 divisors (see below), whose sum is σ = 132535434240. Its totient is φ = 47365456320.

The previous prime is 80078141749. The next prime is 80078141783. The reversal of 80078141781 is 18714187008.

80078141781 is a `hidden beast` number, since 80 + 0 + 7 + 81 + 417 + 81 = 666.

It is not a de Polignac number, because 80078141781 - 2⁵ = 80078141749 is a prime.

It is a super-2 number, since 2×80078141781² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) 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 (80078141783) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28567326 + ... + 28570128.

It is an arithmetic number, because the mean of its divisors is an integer number (2070866160).

Almost surely, 2^80078141781 is an apocalyptic number.

It is an amenable number.

80078141781 is a deficient number, since it is larger than the sum of its proper divisors (52457292459).

80078141781 is a wasteful number, since it uses less digits than its factorization.

80078141781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103 (or 5097 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 45.

The spelling of 80078141781 in words is "eighty billion, seventy-eight million, one hundred forty-one thousand, seven hundred eighty-one".