869030640491 has 24 divisors (see below), whose sum is σ = 952119236880. Its totient is φ = 792731596800.

The previous prime is 869030640481. The next prime is 869030640529. The reversal of 869030640491 is 194046030968.

It is a de Polignac number, because none of the positive numbers 2^k-869030640491 is a prime.

It is a super-2 number, since 2×869030640491² (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 (869030640481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29029211 + ... + 29059131.

It is an arithmetic number, because the mean of its divisors is an integer number (39671634870).

Almost surely, 2^869030640491 is an apocalyptic number.

869030640491 is a deficient number, since it is larger than the sum of its proper divisors (83088596389).

869030640491 is a wasteful number, since it uses less digits than its factorization.

869030640491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31967 (or 31954 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 869030640491 in words is "eight hundred sixty-nine billion, thirty million, six hundred forty thousand, four hundred ninety-one".