49216091409 has 27 divisors (see below), whose sum is σ = 72148306737. Its totient is φ = 32329319616.

The previous prime is 49216091401. The next prime is 49216091461. The reversal of 49216091409 is 90419061294.

The square root of 49216091409 is 221847.

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

49216091409 is a `hidden beast` number, since 4 + 9 + 21 + 609 + 14 + 0 + 9 = 666.

49216091409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19127719809 + 30088371600 = 138303^2 + 173460^2 .

It is not a de Polignac number, because 49216091409 - 2³ = 49216091401 is a prime.

It is a super-3 number, since 3×49216091409³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (49216091401) 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, 48583987 + ... + 48584999.

Almost surely, 2^49216091409 is an apocalyptic number.

49216091409 is the 221847-th square number.

49216091409 is the 110924-th centered octagonal number.

It is an amenable number.

49216091409 is a deficient number, since it is larger than the sum of its proper divisors (22932215328).

49216091409 is an frugal number, since it uses more digits than its factorization.

49216091409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178 (or 1089 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 49216091409 in words is "forty-nine billion, two hundred sixteen million, ninety-one thousand, four hundred nine".