81214250835 has 16 divisors (see below), whose sum is σ = 130139402400. Its totient is φ = 43248733440.

The previous prime is 81214250813. The next prime is 81214250849. The reversal of 81214250835 is 53805241218.

It is not a de Polignac number, because 81214250835 - 2⁹ = 81214250323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81214250793 and 81214250802.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4085610 + ... + 4105439.

It is an arithmetic number, because the mean of its divisors is an integer number (8133712650).

Almost surely, 2^81214250835 is an apocalyptic number.

81214250835 is a deficient number, since it is larger than the sum of its proper divisors (48925151565).

81214250835 is a wasteful number, since it uses less digits than its factorization.

81214250835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8191718.

The product of its (nonzero) digits is 76800, while the sum is 39.

The spelling of 81214250835 in words is "eighty-one billion, two hundred fourteen million, two hundred fifty thousand, eight hundred thirty-five".