85210280464 has 15 divisors (see below), whose sum is σ = 165097180717. Its totient is φ = 42604556416.

The previous prime is 85210280459. The next prime is 85210280483. The reversal of 85210280464 is 46408201258.

It is a happy number.

The square root of 85210280464 is 291908.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11990250000 + 73220030464 = 109500^2 + 270592^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1131144 + ... + 1204120.

Almost surely, 2^85210280464 is an apocalyptic number.

85210280464 is the 291908-th square number.

It is an amenable number.

85210280464 is a deficient number, since it is larger than the sum of its proper divisors (79886900253).

85210280464 is an frugal number, since it uses more digits than its factorization.

85210280464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145962 (or 72979 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 40.

The spelling of 85210280464 in words is "eighty-five billion, two hundred ten million, two hundred eighty thousand, four hundred sixty-four".