861615392317 has 16 divisors (see below), whose sum is σ = 922022643520. Its totient is φ = 802719590400.

The previous prime is 861615392299. The next prime is 861615392333. The reversal of 861615392317 is 713293516168.

It is a cyclic number.

It is not a de Polignac number, because 861615392317 - 2³⁵ = 827255653949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861615392917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5712442 + ... + 5861332.

It is an arithmetic number, because the mean of its divisors is an integer number (57626415220).

Almost surely, 2^861615392317 is an apocalyptic number.

It is an amenable number.

861615392317 is a deficient number, since it is larger than the sum of its proper divisors (60407251203).

861615392317 is a wasteful number, since it uses less digits than its factorization.

861615392317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153964.

The product of its digits is 1632960, while the sum is 52.

The spelling of 861615392317 in words is "eight hundred sixty-one billion, six hundred fifteen million, three hundred ninety-two thousand, three hundred seventeen".