861719224902 has 16 divisors (see below), whose sum is σ = 1729991450880. Its totient is φ = 286147574792.

The previous prime is 861719224889. The next prime is 861719224913. The reversal of 861719224902 is 209422917168.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 273040002 + ... + 273043157.

It is an arithmetic number, because the mean of its divisors is an integer number (108124465680).

Almost surely, 2^861719224902 is an apocalyptic number.

861719224902 is an abundant number, since it is smaller than the sum of its proper divisors (868272225978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861719224902 is a wasteful number, since it uses less digits than its factorization.

861719224902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546083427.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 861719224902 in words is "eight hundred sixty-one billion, seven hundred nineteen million, two hundred twenty-four thousand, nine hundred two".