81089356029 has 16 divisors (see below), whose sum is σ = 121135944000. Its totient is φ = 47816818560.

The previous prime is 81089356027. The next prime is 81089356063. The reversal of 81089356029 is 92065398018.

It is a happy number.

It is not a de Polignac number, because 81089356029 - 2¹ = 81089356027 is a prime.

It is a super-2 number, since 2×81089356029² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81089356021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33204904 + ... + 33207345.

It is an arithmetic number, because the mean of its divisors is an integer number (7570996500).

Almost surely, 2^81089356029 is an apocalyptic number.

It is an amenable number.

81089356029 is a deficient number, since it is larger than the sum of its proper divisors (40046587971).

81089356029 is a wasteful number, since it uses less digits than its factorization.

81089356029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66412300.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 81089356029 in words is "eighty-one billion, eighty-nine million, three hundred fifty-six thousand, twenty-nine".