81214829087 has 8 divisors (see below), whose sum is σ = 92821932672. Its totient is φ = 69608971800.

The previous prime is 81214829077. The next prime is 81214829141. The reversal of 81214829087 is 78092841218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81214829087 - 2¹⁸ = 81214566943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81214829057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167489 + ... + 436442.

It is an arithmetic number, because the mean of its divisors is an integer number (11602741584).

Almost surely, 2^81214829087 is an apocalyptic number.

81214829087 is a deficient number, since it is larger than the sum of its proper divisors (11607103585).

81214829087 is a wasteful number, since it uses less digits than its factorization.

81214829087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623149.

The product of its (nonzero) digits is 516096, while the sum is 50.

The spelling of 81214829087 in words is "eighty-one billion, two hundred fourteen million, eight hundred twenty-nine thousand, eighty-seven".