49169071081 has 27 divisors (see below), whose sum is σ = 54839075823. Its totient is φ = 44064371520.

The previous prime is 49169071079. The next prime is 49169071141. The reversal of 49169071081 is 18017096194.

The square root of 49169071081 is 221741.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 30383627481 + 18785443600 = 174309^2 + 137060^2 .

It is not a de Polignac number, because 49169071081 - 2¹ = 49169071079 is a prime.

It is a super-2 number, since 2×49169071081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49169071051) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 106657191 + ... + 106657651.

Almost surely, 2^49169071081 is an apocalyptic number.

49169071081 is the 221741-st square number.

49169071081 is the 110871-st centered octagonal number.

It is an amenable number.

49169071081 is a deficient number, since it is larger than the sum of its proper divisors (5670004742).

49169071081 is an frugal number, since it uses more digits than its factorization.

49169071081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 46.

The spelling of 49169071081 in words is "forty-nine billion, one hundred sixty-nine million, seventy-one thousand, eighty-one".