85421986763 has 4 divisors (see below), whose sum is σ = 86094600960. Its totient is φ = 84749372568.

The previous prime is 85421986739. The next prime is 85421986787. The reversal of 85421986763 is 36768912458.

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

It is an interprime number because it is at equal distance from previous prime (85421986739) and next prime (85421986787).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85421986763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85421986063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336306908 + ... + 336307161.

It is an arithmetic number, because the mean of its divisors is an integer number (21523650240).

Almost surely, 2^85421986763 is an apocalyptic number.

85421986763 is a deficient number, since it is larger than the sum of its proper divisors (672614197).

85421986763 is a wasteful number, since it uses less digits than its factorization.

85421986763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672614196.

The product of its digits is 17418240, while the sum is 59.

The spelling of 85421986763 in words is "eighty-five billion, four hundred twenty-one million, nine hundred eighty-six thousand, seven hundred sixty-three".