10781873858 has 54 divisors (see below), whose sum is σ = 20017473579. Its totient is φ = 4341942528.

The previous prime is 10781873857. The next prime is 10781873933. The reversal of 10781873858 is 85837818701.

It can be written as a sum of positive squares in 5 ways, for example, as 2180609809 + 8601264049 = 46697^2 + 92743^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=73423.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10781873857) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17474366 + ... + 17474982.

Almost surely, 2^10781873858 is an apocalyptic number.

10781873858 is a deficient number, since it is larger than the sum of its proper divisors (9235599721).

10781873858 is an frugal number, since it uses more digits than its factorization.

10781873858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 56.

The spelling of 10781873858 in words is "ten billion, seven hundred eighty-one million, eight hundred seventy-three thousand, eight hundred fifty-eight".