862643159491 has 4 divisors (see below), whose sum is σ = 864036767800. Its totient is φ = 861249551184.

The previous prime is 862643159459. The next prime is 862643159503. The reversal of 862643159491 is 194951346268.

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

It is a cyclic number.

It is not a de Polignac number, because 862643159491 - 2⁵ = 862643159459 is a prime.

It is a super-2 number, since 2×862643159491² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (862643159591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696803226 + ... + 696804463.

It is an arithmetic number, because the mean of its divisors is an integer number (216009191950).

Almost surely, 2^862643159491 is an apocalyptic number.

862643159491 is a deficient number, since it is larger than the sum of its proper divisors (1393608309).

862643159491 is a wasteful number, since it uses less digits than its factorization.

862643159491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393608308.

The product of its digits is 11197440, while the sum is 58.

The spelling of 862643159491 in words is "eight hundred sixty-two billion, six hundred forty-three million, one hundred fifty-nine thousand, four hundred ninety-one".