49591281481 has 27 divisors (see below), whose sum is σ = 59800159029. Its totient is φ = 41003648448.

The previous prime is 49591281473. The next prime is 49591281511. The reversal of 49591281481 is 18418219594.

The square root of 49591281481 is 222691.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1929405625 + 47661875856 = 43925^2 + 218316^2 .

It is not a de Polignac number, because 49591281481 - 2³ = 49591281473 is a prime.

It is a super-2 number, since 2×49591281481² (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 (49591281881) 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, 45205725 + ... + 45206821.

Almost surely, 2^49591281481 is an apocalyptic number.

49591281481 is the 222691-st square number.

49591281481 is the 111346-th centered octagonal number.

It is an amenable number.

49591281481 is a deficient number, since it is larger than the sum of its proper divisors (10208877548).

49591281481 is an frugal number, since it uses more digits than its factorization.

49591281481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266 (or 1133 counting only the distinct ones).

The product of its digits is 829440, while the sum is 52.

The spelling of 49591281481 in words is "forty-nine billion, five hundred ninety-one million, two hundred eighty-one thousand, four hundred eighty-one".