86615448764638 has 4 divisors (see below), whose sum is σ = 129923173146960. Its totient is φ = 43307724382318.

The previous prime is 86615448764627. The next prime is 86615448764639. The reversal of 86615448764638 is 83646784451668.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86615448764639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21653862191158 + ... + 21653862191161.

It is an arithmetic number, because the mean of its divisors is an integer number (32480793286740).

Almost surely, 2^{86615448764638} is an apocalyptic number.

86615448764638 is a deficient number, since it is larger than the sum of its proper divisors (43307724382322).

86615448764638 is a wasteful number, since it uses less digits than its factorization.

86615448764638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43307724382321.

The product of its digits is 4459069440, while the sum is 76.

The spelling of 86615448764638 in words is "eighty-six trillion, six hundred fifteen billion, four hundred forty-eight million, seven hundred sixty-four thousand, six hundred thirty-eight".