85319644442 has 4 divisors (see below), whose sum is σ = 127979466666. Its totient is φ = 42659822220.

The previous prime is 85319644441. The next prime is 85319644453. The reversal of 85319644442 is 24444691358.

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., 84164392321 + 1155252121 = 290111^2 + 33989^2 .

It is not an unprimeable number, because it can be changed into a prime (85319644441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21329911109 + ... + 21329911112.

Almost surely, 2^85319644442 is an apocalyptic number.

85319644442 is a deficient number, since it is larger than the sum of its proper divisors (42659822224).

85319644442 is a wasteful number, since it uses less digits than its factorization.

85319644442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42659822223.

The product of its digits is 3317760, while the sum is 50.

The spelling of 85319644442 in words is "eighty-five billion, three hundred nineteen million, six hundred forty-four thousand, four hundred forty-two".