861916363 has 16 divisors (see below), whose sum is σ = 1075253760. Its totient is φ = 671212800.

The previous prime is 861916339. The next prime is 861916379. The reversal of 861916363 is 363619168.

It is a cyclic number.

It is not a de Polignac number, because 861916363 - 2²¹ = 859819211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861916333) 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, 206683 + ... + 210811.

It is an arithmetic number, because the mean of its divisors is an integer number (67203360).

Almost surely, 2^861916363 is an apocalyptic number.

861916363 is a deficient number, since it is larger than the sum of its proper divisors (213337397).

861916363 is a wasteful number, since it uses less digits than its factorization.

861916363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6858.

The product of its digits is 139968, while the sum is 43.

The square root of 861916363 is about 29358.4121334925. The cubic root of 861916363 is about 951.6743742375.

The spelling of 861916363 in words is "eight hundred sixty-one million, nine hundred sixteen thousand, three hundred sixty-three".