863540651 has 8 divisors (see below), whose sum is σ = 869796144. Its totient is φ = 857308000.

The previous prime is 863540617. The next prime is 863540693. The reversal of 863540651 is 156045368.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-863540651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863540351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74141 + ... + 84993.

It is an arithmetic number, because the mean of its divisors is an integer number (108724518).

Almost surely, 2^863540651 is an apocalyptic number.

863540651 is a deficient number, since it is larger than the sum of its proper divisors (6255493).

863540651 is a wasteful number, since it uses less digits than its factorization.

863540651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11421.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 863540651 is about 29386.0621894122. The cubic root of 863540651 is about 952.2718116563.

The spelling of 863540651 in words is "eight hundred sixty-three million, five hundred forty thousand, six hundred fifty-one".