85506913556 has 6 divisors (see below), whose sum is σ = 149637098730. Its totient is φ = 42753456776.

The previous prime is 85506913543. The next prime is 85506913619. The reversal of 85506913556 is 65531960558.

It can be written as a sum of positive squares in only one way, i.e., 84613501456 + 893412100 = 290884^2 + 29890^2 .

It is a super-2 number, since 2×85506913556² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85506913498 and 85506913507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10688364191 + ... + 10688364198.

It is an arithmetic number, because the mean of its divisors is an integer number (24939516455).

Almost surely, 2^85506913556 is an apocalyptic number.

It is an amenable number.

85506913556 is a deficient number, since it is larger than the sum of its proper divisors (64130185174).

85506913556 is a wasteful number, since it uses less digits than its factorization.

85506913556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21376728393 (or 21376728391 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 85506913556 in words is "eighty-five billion, five hundred six million, nine hundred thirteen thousand, five hundred fifty-six".