82195893505 has 12 divisors (see below), whose sum is σ = 108417063636. Its totient is φ = 59778831200.

The previous prime is 82195893491. The next prime is 82195893581. The reversal of 82195893505 is 50539859128.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 62306150544 + 19889742961 = 249612^2 + 141031^2 .

It is not a de Polignac number, because 82195893505 - 2⁵ = 82195893473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67929886 + ... + 67931095.

It is an arithmetic number, because the mean of its divisors is an integer number (9034755303).

Almost surely, 2^82195893505 is an apocalyptic number.

It is an amenable number.

82195893505 is a deficient number, since it is larger than the sum of its proper divisors (26221170131).

82195893505 is a wasteful number, since it uses less digits than its factorization.

82195893505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135861008 (or 135860997 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 55.

The spelling of 82195893505 in words is "eighty-two billion, one hundred ninety-five million, eight hundred ninety-three thousand, five hundred five".