87205206446 has 4 divisors (see below), whose sum is σ = 130807809672. Its totient is φ = 43602603222.

The previous prime is 87205206443. The next prime is 87205206457. The reversal of 87205206446 is 64460250278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64460250278 = 2 ⋅32230125139.

It is a junction number, because it is equal to n+sod(n) for n = 87205206397 and 87205206406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87205206443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21801301610 + ... + 21801301613.

It is an arithmetic number, because the mean of its divisors is an integer number (32701952418).

Almost surely, 2^87205206446 is an apocalyptic number.

87205206446 is a deficient number, since it is larger than the sum of its proper divisors (43602603226).

87205206446 is a wasteful number, since it uses less digits than its factorization.

87205206446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43602603225.

The product of its (nonzero) digits is 645120, while the sum is 44.

The spelling of 87205206446 in words is "eighty-seven billion, two hundred five million, two hundred six thousand, four hundred forty-six".