49454198689 has 9 divisors (see below), whose sum is σ = 57530164467. Its totient is φ = 42387978864.

The previous prime is 49454198683. The next prime is 49454198693. The reversal of 49454198689 is 98689145494.

The square root of 49454198689 is 222383.

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., 12988477089 + 36465721600 = 113967^2 + 190960^2 .

It is not a de Polignac number, because 49454198689 - 2⁷ = 49454198561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49454198683) 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, 1540797 + ... + 1572565.

Almost surely, 2^49454198689 is an apocalyptic number.

49454198689 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

49454198689 is the 222383-rd square number.

49454198689 is the 111192-nd centered octagonal number.

It is an amenable number.

49454198689 is a deficient number, since it is larger than the sum of its proper divisors (8075965778).

49454198689 is an frugal number, since it uses more digits than its factorization.

49454198689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63552 (or 31776 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 67.

The spelling of 49454198689 in words is "forty-nine billion, four hundred fifty-four million, one hundred ninety-eight thousand, six hundred eighty-nine".