85701157281 has 6 divisors (see below), whose sum is σ = 123790560530. Its totient is φ = 57134104848.

The previous prime is 85701157277. The next prime is 85701157301. The reversal of 85701157281 is 18275110758.

85701157281 is a `hidden beast` number, since 8 + 5 + 70 + 1 + 1 + 572 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 71280990225 + 14420167056 = 266985^2 + 120084^2 .

It is not a de Polignac number, because 85701157281 - 2² = 85701157277 is a prime.

It is a super-2 number, since 2×85701157281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85701157081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4761175396 + ... + 4761175413.

Almost surely, 2^85701157281 is an apocalyptic number.

It is an amenable number.

85701157281 is a deficient number, since it is larger than the sum of its proper divisors (38089403249).

85701157281 is a wasteful number, since it uses less digits than its factorization.

85701157281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9522350815 (or 9522350812 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 45.

The spelling of 85701157281 in words is "eighty-five billion, seven hundred one million, one hundred fifty-seven thousand, two hundred eighty-one".