85721012758 has 4 divisors (see below), whose sum is σ = 128581519140. Its totient is φ = 42860506378.

The previous prime is 85721012753. The next prime is 85721012759.

85721012758 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85721012753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21430253188 + ... + 21430253191.

It is an arithmetic number, because the mean of its divisors is an integer number (32145379785).

Almost surely, 2^85721012758 is an apocalyptic number.

85721012758 is a deficient number, since it is larger than the sum of its proper divisors (42860506382).

85721012758 is a wasteful number, since it uses less digits than its factorization.

85721012758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42860506381.

The product of its (nonzero) digits is 313600, while the sum is 46.

It can be divided in two parts, 857210 and 12758, that added together give a palindrome (869968).

The spelling of 85721012758 in words is "eighty-five billion, seven hundred twenty-one million, twelve thousand, seven hundred fifty-eight".