80818214543781 has 96 divisors (see below), whose sum is σ = 133120275240960. Its totient is φ = 43241044851840.

The previous prime is 80818214543777. The next prime is 80818214543783. The reversal of 80818214543781 is 18734541281808.

It is not a de Polignac number, because 80818214543781 - 2² = 80818214543777 is a prime.

It is a super-2 number, since 2×80818214543781² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80818214543783) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 820381930 + ... + 820480436.

It is an arithmetic number, because the mean of its divisors is an integer number (1386669533760).

Almost surely, 2^{80818214543781} is an apocalyptic number.

It is an amenable number.

80818214543781 is a deficient number, since it is larger than the sum of its proper divisors (52302060697179).

80818214543781 is a wasteful number, since it uses less digits than its factorization.

80818214543781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106127 (or 106116 counting only the distinct ones).

The product of its (nonzero) digits is 13762560, while the sum is 60.

The spelling of 80818214543781 in words is "eighty trillion, eight hundred eighteen billion, two hundred fourteen million, five hundred forty-three thousand, seven hundred eighty-one".