85715271477 has 12 divisors (see below), whose sum is σ = 135066488544. Its totient is φ = 51948649320.

The previous prime is 85715271373. The next prime is 85715271487. The reversal of 85715271477 is 77417251758.

85715271477 is a `hidden beast` number, since 8 + 5 + 71 + 527 + 1 + 47 + 7 = 666.

It is not a de Polignac number, because 85715271477 - 2³¹ = 83567787829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85715271487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 432905313 + ... + 432905510.

It is an arithmetic number, because the mean of its divisors is an integer number (11255540712).

Almost surely, 2^85715271477 is an apocalyptic number.

It is an amenable number.

85715271477 is a deficient number, since it is larger than the sum of its proper divisors (49351217067).

85715271477 is a wasteful number, since it uses less digits than its factorization.

85715271477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865810840 (or 865810837 counting only the distinct ones).

The product of its digits is 3841600, while the sum is 54.

The spelling of 85715271477 in words is "eighty-five billion, seven hundred fifteen million, two hundred seventy-one thousand, four hundred seventy-seven".