81605460302 has 8 divisors (see below), whose sum is σ = 122422050000. Its totient is φ = 40798110304.

The previous prime is 81605460301. The next prime is 81605460319. The reversal of 81605460302 is 20306450618.

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

It is a super-2 number, since 2×81605460302² (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 (81605460301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2287802 + ... + 2323197.

It is an arithmetic number, because the mean of its divisors is an integer number (15302756250).

Almost surely, 2^81605460302 is an apocalyptic number.

81605460302 is a deficient number, since it is larger than the sum of its proper divisors (40816589698).

81605460302 is a wasteful number, since it uses less digits than its factorization.

81605460302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4619850.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 81605460302 in words is "eighty-one billion, six hundred five million, four hundred sixty thousand, three hundred two".