81400000814 has 32 divisors (see below), whose sum is σ = 144847084896. Its totient is φ = 33882347520.

The previous prime is 81400000813. The next prime is 81400000837. The reversal of 81400000814 is 41800000418.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81400000813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2927339 + ... + 2955014.

It is an arithmetic number, because the mean of its divisors is an integer number (4526471403).

Almost surely, 2^81400000814 is an apocalyptic number.

81400000814 is a deficient number, since it is larger than the sum of its proper divisors (63447084082).

81400000814 is a wasteful number, since it uses less digits than its factorization.

81400000814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5882420.

The product of its (nonzero) digits is 1024, while the sum is 26.

The spelling of 81400000814 in words is "eighty-one billion, four hundred million, eight hundred fourteen", and thus it is an aban number.