861362250338 has 6 divisors (see below), whose sum is σ = 1292045344299. Its totient is φ = 430680468906.

The previous prime is 861362250317. The next prime is 861362250361. The reversal of 861362250338 is 833052263168.

It can be written as a sum of positive squares in only one way, i.e., 430681125169 + 430681125169 = 656263^2 + 656263^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=656263.

It is a super-2 number, since 2×861362250338² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861362250292 and 861362250301.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 984395 + ... + 1640657.

Almost surely, 2^861362250338 is an apocalyptic number.

861362250338 is a deficient number, since it is larger than the sum of its proper divisors (430683093961).

861362250338 is an frugal number, since it uses more digits than its factorization.

861362250338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312528 (or 656265 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 861362250338 in words is "eight hundred sixty-one billion, three hundred sixty-two million, two hundred fifty thousand, three hundred thirty-eight".