85556287820 has 12 divisors (see below), whose sum is σ = 179668204464. Its totient is φ = 34222515120.

The previous prime is 85556287799. The next prime is 85556287847. The reversal of 85556287820 is 2878265558.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2138907176 + ... + 2138907215.

It is an arithmetic number, because the mean of its divisors is an integer number (14972350372).

Almost surely, 2^85556287820 is an apocalyptic number.

It is an amenable number.

85556287820 is an abundant number, since it is smaller than the sum of its proper divisors (94111916644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85556287820 is a wasteful number, since it uses less digits than its factorization.

85556287820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277814400 (or 4277814398 counting only the distinct ones).

The product of its (nonzero) digits is 10752000, while the sum is 56.

The spelling of 85556287820 in words is "eighty-five billion, five hundred fifty-six million, two hundred eighty-seven thousand, eight hundred twenty".