85719830638 has 16 divisors (see below), whose sum is σ = 138888849456. Its totient is φ = 39443469120.

The previous prime is 85719830621. The next prime is 85719830639. The reversal of 85719830638 is 83603891758.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85719830639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4971631 + ... + 4988842.

It is an arithmetic number, because the mean of its divisors is an integer number (8680553091).

Almost surely, 2^85719830638 is an apocalyptic number.

85719830638 is a deficient number, since it is larger than the sum of its proper divisors (53169018818).

85719830638 is a wasteful number, since it uses less digits than its factorization.

85719830638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9960819.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 85719830638 in words is "eighty-five billion, seven hundred nineteen million, eight hundred thirty thousand, six hundred thirty-eight".