861085692523 has 8 divisors (see below), whose sum is σ = 1018032346080. Its totient is φ = 712622641920.

The previous prime is 861085692497. The next prime is 861085692529. The reversal of 861085692523 is 325296580168.

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

It is a de Polignac number, because none of the positive numbers 2^k-861085692523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861085692529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2120900518 + ... + 2120900923.

It is an arithmetic number, because the mean of its divisors is an integer number (127254043260).

Almost surely, 2^861085692523 is an apocalyptic number.

861085692523 is a deficient number, since it is larger than the sum of its proper divisors (156946653557).

861085692523 is a wasteful number, since it uses less digits than its factorization.

861085692523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4241801477.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 861085692523 in words is "eight hundred sixty-one billion, eighty-five million, six hundred ninety-two thousand, five hundred twenty-three".