81589651022 has 16 divisors (see below), whose sum is σ = 133574324400. Its totient is φ = 37068431040.

The previous prime is 81589650997. The next prime is 81589651051. The reversal of 81589651022 is 22015698518.

It is a super-3 number, since 3×81589651022³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 841697 + ... + 933612.

It is an arithmetic number, because the mean of its divisors is an integer number (8348395275).

Almost surely, 2^81589651022 is an apocalyptic number.

81589651022 is a deficient number, since it is larger than the sum of its proper divisors (51984673378).

81589651022 is a wasteful number, since it uses less digits than its factorization.

81589651022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777411.

The product of its (nonzero) digits is 345600, while the sum is 47.

The spelling of 81589651022 in words is "eighty-one billion, five hundred eighty-nine million, six hundred fifty-one thousand, twenty-two".