81605101602 has 16 divisors (see below), whose sum is σ = 163214248032. Its totient is φ = 27201026400.

The previous prime is 81605101573. The next prime is 81605101621. The reversal of 81605101602 is 20610150618.

It is a self number, because there is not a number n which added to its sum of digits gives 81605101602.

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, 136102 + ... + 426302.

It is an arithmetic number, because the mean of its divisors is an integer number (10200890502).

Almost surely, 2^81605101602 is an apocalyptic number.

81605101602 is an abundant number, since it is smaller than the sum of its proper divisors (81609146430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81605101602 is a wasteful number, since it uses less digits than its factorization.

81605101602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337073.

The product of its (nonzero) digits is 2880, while the sum is 30.

The spelling of 81605101602 in words is "eighty-one billion, six hundred five million, one hundred one thousand, six hundred two".