85742241757 has 4 divisors (see below), whose sum is σ = 85985137980. Its totient is φ = 85499345536.

The previous prime is 85742241751. The next prime is 85742241769. The reversal of 85742241757 is 75714224758.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75714224758 = 2 ⋅37857112379.

It can be written as a sum of positive squares in 2 ways, for example, as 66528400761 + 19213840996 = 257931^2 + 138614^2 .

It is a cyclic number.

It is not a de Polignac number, because 85742241757 - 2¹⁵ = 85742208989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85742241751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121447582 + ... + 121448287.

It is an arithmetic number, because the mean of its divisors is an integer number (21496284495).

Almost surely, 2^85742241757 is an apocalyptic number.

It is an amenable number.

85742241757 is a deficient number, since it is larger than the sum of its proper divisors (242896223).

85742241757 is a wasteful number, since it uses less digits than its factorization.

85742241757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242896222.

The product of its digits is 4390400, while the sum is 52.

The spelling of 85742241757 in words is "eighty-five billion, seven hundred forty-two million, two hundred forty-one thousand, seven hundred fifty-seven".