86749505653 has 4 divisors (see below), whose sum is σ = 86753992780. Its totient is φ = 86745018528.

The previous prime is 86749505629. The next prime is 86749505749. The reversal of 86749505653 is 35650594768.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4117403889 + 82632101764 = 64167^2 + 287458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86749505653 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 (86749508653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2214438 + ... + 2253271.

It is an arithmetic number, because the mean of its divisors is an integer number (21688498195).

Almost surely, 2^86749505653 is an apocalyptic number.

It is an amenable number.

86749505653 is a deficient number, since it is larger than the sum of its proper divisors (4487127).

86749505653 is a wasteful number, since it uses less digits than its factorization.

86749505653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4487126.

The product of its (nonzero) digits is 27216000, while the sum is 58.

The spelling of 86749505653 in words is "eighty-six billion, seven hundred forty-nine million, five hundred five thousand, six hundred fifty-three".