86646139901 has 4 divisors (see below), whose sum is σ = 89441176704. Its totient is φ = 83851103100.

The previous prime is 86646139897. The next prime is 86646139927. The reversal of 86646139901 is 10993164668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86646139901 - 2² = 86646139897 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 (86646139961) 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, 1397518355 + ... + 1397518416.

It is an arithmetic number, because the mean of its divisors is an integer number (22360294176).

Almost surely, 2^86646139901 is an apocalyptic number.

It is an amenable number.

86646139901 is a deficient number, since it is larger than the sum of its proper divisors (2795036803).

86646139901 is a wasteful number, since it uses less digits than its factorization.

86646139901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795036802.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 86646139901 in words is "eighty-six billion, six hundred forty-six million, one hundred thirty-nine thousand, nine hundred one".