81214298837 has 16 divisors (see below), whose sum is σ = 95774216832. Its totient is φ = 67418638080.

The previous prime is 81214298831. The next prime is 81214298903. The reversal of 81214298837 is 73889241218.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81214298837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81214298831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 993443 + ... + 1072080.

It is an arithmetic number, because the mean of its divisors is an integer number (5985888552).

Almost surely, 2^81214298837 is an apocalyptic number.

It is an amenable number.

81214298837 is a deficient number, since it is larger than the sum of its proper divisors (14559917995).

81214298837 is a wasteful number, since it uses less digits than its factorization.

81214298837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065708.

The product of its digits is 1548288, while the sum is 53.

The spelling of 81214298837 in words is "eighty-one billion, two hundred fourteen million, two hundred ninety-eight thousand, eight hundred thirty-seven".