838749161556 has 36 divisors (see below), whose sum is σ = 2156106607200. Its totient is φ = 274844357328.

The previous prime is 838749161531. The next prime is 838749161561. The reversal of 838749161556 is 655161947838.

838749161556 is a `hidden beast` number, since 8 + 3 + 8 + 7 + 4 + 9 + 1 + 615 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×838749161556² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 838749161493 and 838749161502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197443536 + ... + 197447783.

It is an arithmetic number, because the mean of its divisors is an integer number (59891850200).

Almost surely, 2^838749161556 is an apocalyptic number.

It is an amenable number.

838749161556 is an abundant number, since it is smaller than the sum of its proper divisors (1317357445644).

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

838749161556 is a wasteful number, since it uses less digits than its factorization.

838749161556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394891388 (or 394891383 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 838749161556 in words is "eight hundred thirty-eight billion, seven hundred forty-nine million, one hundred sixty-one thousand, five hundred fifty-six".