81414080140 has 24 divisors (see below), whose sum is σ = 172058553072. Its totient is φ = 32358206400.

The previous prime is 81414080113. The next prime is 81414080141. The reversal of 81414080140 is 4108041418.

It is not an unprimeable number, because it can be changed into a prime (81414080141) 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, 12960886 + ... + 12967165.

It is an arithmetic number, because the mean of its divisors is an integer number (7169106378).

Almost surely, 2^81414080140 is an apocalyptic number.

It is an amenable number.

81414080140 is an abundant number, since it is smaller than the sum of its proper divisors (90644472932).

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

81414080140 is a wasteful number, since it uses less digits than its factorization.

81414080140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25928217 (or 25928215 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 31.

The spelling of 81414080140 in words is "eighty-one billion, four hundred fourteen million, eighty thousand, one hundred forty".