85811517628477 has 16 divisors (see below), whose sum is σ = 88323773779584. Its totient is φ = 83319251904000.

The previous prime is 85811517628429. The next prime is 85811517628481. The reversal of 85811517628477 is 77482671511858.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85811517628477 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 (85811517628427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325206277 + ... + 325470037.

It is an arithmetic number, because the mean of its divisors is an integer number (5520235861224).

Almost surely, 2^{85811517628477} is an apocalyptic number.

It is an amenable number.

85811517628477 is a deficient number, since it is larger than the sum of its proper divisors (2512256151107).

85811517628477 is a wasteful number, since it uses less digits than its factorization.

85811517628477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301620.

The product of its digits is 210739200, while the sum is 70.

The spelling of 85811517628477 in words is "eighty-five trillion, eight hundred eleven billion, five hundred seventeen million, six hundred twenty-eight thousand, four hundred seventy-seven".