82581465451802 has 4 divisors (see below), whose sum is σ = 123872198177706. Its totient is φ = 41290732725900.

The previous prime is 82581465451781. The next prime is 82581465451829. The reversal of 82581465451802 is 20815456418528.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 80389138068001 + 2192327383801 = 8965999^2 + 1480651^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20645366362949 + ... + 20645366362952.

Almost surely, 2^{82581465451802} is an apocalyptic number.

82581465451802 is a deficient number, since it is larger than the sum of its proper divisors (41290732725904).

82581465451802 is a wasteful number, since it uses less digits than its factorization.

82581465451802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41290732725903.

The product of its (nonzero) digits is 24576000, while the sum is 59.

The spelling of 82581465451802 in words is "eighty-two trillion, five hundred eighty-one billion, four hundred sixty-five million, four hundred fifty-one thousand, eight hundred two".