81400141400 has 48 divisors (see below), whose sum is σ = 189406236600. Its totient is φ = 32534094080.

The previous prime is 81400141391. The next prime is 81400141439. The reversal of 81400141400 is 414100418.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90164 + ... + 413436.

Almost surely, 2^81400141400 is an apocalyptic number.

It is an amenable number.

81400141400 is an abundant number, since it is smaller than the sum of its proper divisors (108006095200).

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

81400141400 is a wasteful number, since it uses less digits than its factorization.

81400141400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324548 (or 324539 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 81400141400 its reverse (414100418), we get a palindrome (81814241818).

The spelling of 81400141400 in words is "eighty-one billion, four hundred million, one hundred forty-one thousand, four hundred".