85865061663437 has 12 divisors (see below), whose sum is σ = 99890263688220. Its totient is φ = 73593896374656.

The previous prime is 85865061663431. The next prime is 85865061663457. The reversal of 85865061663437 is 73436616056858.

It can be written as a sum of positive squares in 2 ways, for example, as 43453330183396 + 42411731480041 = 6591914^2 + 6512429^2 .

It is not a de Polignac number, because 85865061663437 - 2¹² = 85865061659341 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 (85865061663431) 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, 55513958 + ... + 57039719.

It is an arithmetic number, because the mean of its divisors is an integer number (8324188640685).

Almost surely, 2^{85865061663437} is an apocalyptic number.

It is an amenable number.

85865061663437 is a deficient number, since it is larger than the sum of its proper divisors (14025202024783).

85865061663437 is a wasteful number, since it uses less digits than its factorization.

85865061663437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112569260 (or 112569253 counting only the distinct ones).

The product of its (nonzero) digits is 522547200, while the sum is 68.

The spelling of 85865061663437 in words is "eighty-five trillion, eight hundred sixty-five billion, sixty-one million, six hundred sixty-three thousand, four hundred thirty-seven".