81414235397 has 16 divisors (see below), whose sum is σ = 90776961792. Its totient is φ = 72387232320.

The previous prime is 81414235393. The next prime is 81414235411. The reversal of 81414235397 is 79353241418.

It is a cyclic number.

It is not a de Polignac number, because 81414235397 - 2² = 81414235393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81414235393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35453 + ... + 405074.

It is an arithmetic number, because the mean of its divisors is an integer number (5673560112).

Almost surely, 2^81414235397 is an apocalyptic number.

It is an amenable number.

81414235397 is a deficient number, since it is larger than the sum of its proper divisors (9362726395).

81414235397 is a wasteful number, since it uses less digits than its factorization.

81414235397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440908.

The product of its digits is 725760, while the sum is 47.

The spelling of 81414235397 in words is "eighty-one billion, four hundred fourteen million, two hundred thirty-five thousand, three hundred ninety-seven".