838561710722 has 54 divisors (see below), whose sum is σ = 1345727806563. Its totient is φ = 391862958344.

The previous prime is 838561710713. The next prime is 838561710733. The reversal of 838561710722 is 227017165838.

It can be written as a sum of positive squares in only one way, i.e., 419280855361 + 419280855361 = 647519^2 + 647519^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=647519.

It is a super-2 number, since 2×838561710722² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1399935779 + ... + 1399936377.

Almost surely, 2^838561710722 is an apocalyptic number.

838561710722 is a deficient number, since it is larger than the sum of its proper divisors (507166095841).

838561710722 is an frugal number, since it uses more digits than its factorization.

838561710722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 50.

Multiplying 838561710722 by its sum of digits (50), we get a square (41928085536100 = 6475190²).

The spelling of 838561710722 in words is "eight hundred thirty-eight billion, five hundred sixty-one million, seven hundred ten thousand, seven hundred twenty-two".