864781187469 has 16 divisors (see below), whose sum is σ = 1153734491712. Its totient is φ = 576174446208.

The previous prime is 864781187467. The next prime is 864781187471. The reversal of 864781187469 is 964781187468.

It is an interprime number because it is at equal distance from previous prime (864781187467) and next prime (864781187471).

It is not a de Polignac number, because 864781187469 - 2¹ = 864781187467 is a prime.

It is a super-2 number, since 2×864781187469² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864781187461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46006737 + ... + 46025529.

It is an arithmetic number, because the mean of its divisors is an integer number (72108405732).

Almost surely, 2^864781187469 is an apocalyptic number.

It is an amenable number.

864781187469 is a deficient number, since it is larger than the sum of its proper divisors (288953304243).

864781187469 is a wasteful number, since it uses less digits than its factorization.

864781187469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27196.

The product of its digits is 130056192, while the sum is 69.

Subtracting 864781187469 from its reverse (964781187468), we obtain a palindrome (99999999999).

The spelling of 864781187469 in words is "eight hundred sixty-four billion, seven hundred eighty-one million, one hundred eighty-seven thousand, four hundred sixty-nine".