86821581436 has 36 divisors (see below), whose sum is σ = 158212504632. Its totient is φ = 41658551424.

The previous prime is 86821581397. The next prime is 86821581437. The reversal of 86821581436 is 63418512868.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86821581437) 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 11 ways as a sum of consecutive naturals, for example, 733651 + ... + 843733.

Almost surely, 2^86821581436 is an apocalyptic number.

It is an amenable number.

86821581436 is a deficient number, since it is larger than the sum of its proper divisors (71390923196).

86821581436 is a wasteful number, since it uses less digits than its factorization.

86821581436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110270 (or 110195 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 52.

The spelling of 86821581436 in words is "eighty-six billion, eight hundred twenty-one million, five hundred eighty-one thousand, four hundred thirty-six".