86780798775 has 36 divisors (see below), whose sum is σ = 169564426200. Its totient is φ = 42075537600.

The previous prime is 86780798749. The next prime is 86780798777. The reversal of 86780798775 is 57789708768.

It is not a de Polignac number, because 86780798775 - 2¹⁶ = 86780733239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86780798777) 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 35 ways as a sum of consecutive naturals, for example, 17529000 + ... + 17533949.

It is an arithmetic number, because the mean of its divisors is an integer number (4710122950).

Almost surely, 2^86780798775 is an apocalyptic number.

86780798775 is a deficient number, since it is larger than the sum of its proper divisors (82783627425).

86780798775 is a wasteful number, since it uses less digits than its factorization.

86780798775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35062976 (or 35062968 counting only the distinct ones).

The product of its (nonzero) digits is 331914240, while the sum is 72.

The spelling of 86780798775 in words is "eighty-six billion, seven hundred eighty million, seven hundred ninety-eight thousand, seven hundred seventy-five".