85642771707 has 24 divisors (see below), whose sum is σ = 124416297408. Its totient is φ = 56768342400.

The previous prime is 85642771673. The next prime is 85642771741. The reversal of 85642771707 is 70717724658.

85642771707 is a `hidden beast` number, since 8 + 564 + 2 + 7 + 7 + 1 + 70 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (85642771673) and next prime (85642771741).

It is not a de Polignac number, because 85642771707 - 2⁷ = 85642771579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85642771607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1134357 + ... + 1207497.

It is an arithmetic number, because the mean of its divisors is an integer number (5184012392).

Almost surely, 2^85642771707 is an apocalyptic number.

85642771707 is a deficient number, since it is larger than the sum of its proper divisors (38773525701).

85642771707 is a wasteful number, since it uses less digits than its factorization.

85642771707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73891 (or 73888 counting only the distinct ones).

The product of its (nonzero) digits is 4609920, while the sum is 54.

The spelling of 85642771707 in words is "eighty-five billion, six hundred forty-two million, seven hundred seventy-one thousand, seven hundred seven".