861003826875 has 90 divisors (see below), whose sum is σ = 1612328930212. Its totient is φ = 459009180000.

The previous prime is 861003826871. The next prime is 861003826877. The reversal of 861003826875 is 578628300168.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

861003826875 is a `hidden beast` number, since 86 + 100 + 382 + 6 + 87 + 5 = 666.

It is not a de Polignac number, because 861003826875 - 2² = 861003826871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861003826871) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 361613185 + ... + 361615565.

Almost surely, 2^861003826875 is an apocalyptic number.

861003826875 is a deficient number, since it is larger than the sum of its proper divisors (751325103337).

861003826875 is an frugal number, since it uses more digits than its factorization.

861003826875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797 (or 2389 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 861003826875 in words is "eight hundred sixty-one billion, three million, eight hundred twenty-six thousand, eight hundred seventy-five".