49187699089 has 9 divisors (see below), whose sum is σ = 49595338299. Its totient is φ = 48783388680.

The previous prime is 49187699069. The next prime is 49187699167. The reversal of 49187699089 is 98099678194.

The square root of 49187699089 is 221783.

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

It can be written as a sum of positive squares in only one way, i.e., 18740241025 + 30447458064 = 136895^2 + 174492^2 .

It is not a de Polignac number, because 49187699089 - 2¹³ = 49187690897 is a prime.

It is a super-2 number, since 2×49187699089² (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 (49187699069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 29052727 + ... + 29054419.

Almost surely, 2^49187699089 is an apocalyptic number.

49187699089 is the 221783-rd square number.

49187699089 is the 110892-nd centered octagonal number.

It is an amenable number.

49187699089 is a deficient number, since it is larger than the sum of its proper divisors (407639210).

49187699089 is an frugal number, since it uses more digits than its factorization.

49187699089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3648 (or 1824 counting only the distinct ones).

The product of its (nonzero) digits is 70543872, while the sum is 70.

The spelling of 49187699089 in words is "forty-nine billion, one hundred eighty-seven million, six hundred ninety-nine thousand, eighty-nine".