85642620055 has 16 divisors (see below), whose sum is σ = 106328106720. Its totient is φ = 66143371392.

The previous prime is 85642620001. The next prime is 85642620079. The reversal of 85642620055 is 55002624658.

It is a cyclic number.

It is not a de Polignac number, because 85642620055 - 2¹³ = 85642611863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85642619993 and 85642620020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1313332 + ... + 1376998.

It is an arithmetic number, because the mean of its divisors is an integer number (6645506670).

Almost surely, 2^85642620055 is an apocalyptic number.

85642620055 is a deficient number, since it is larger than the sum of its proper divisors (20685486665).

85642620055 is a wasteful number, since it uses less digits than its factorization.

85642620055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72978.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 85642620055 in words is "eighty-five billion, six hundred forty-two million, six hundred twenty thousand, fifty-five".