86021242786 has 4 divisors (see below), whose sum is σ = 129031864182. Its totient is φ = 43010621392.

The previous prime is 86021242777. The next prime is 86021242807. The reversal of 86021242786 is 68724212068.

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

It can be written as a sum of positive squares in only one way, i.e., 75394725561 + 10626517225 = 274581^2 + 103085^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 21505310695 + ... + 21505310698.

Almost surely, 2^86021242786 is an apocalyptic number.

86021242786 is a deficient number, since it is larger than the sum of its proper divisors (43010621396).

86021242786 is a wasteful number, since it uses less digits than its factorization.

86021242786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43010621395.

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 86021242786 in words is "eighty-six billion, twenty-one million, two hundred forty-two thousand, seven hundred eighty-six".