49391951049 has 81 divisors (see below), whose sum is σ = 87747343047. Its totient is φ = 26690495328.

The previous prime is 49391951039. The next prime is 49391951101. The reversal of 49391951049 is 94015919394.

It is a happy number.

The square root of 49391951049 is 222243.

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

49391951049 is a `hidden beast` number, since 49 + 39 + 19 + 510 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4334247225 + 45057703824 = 65835^2 + 212268^2 .

It is not a de Polignac number, because 49391951049 - 2¹⁵ = 49391918281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49391950986 and 49391951004.

It is not an unprimeable number, because it can be changed into a prime (49391951029) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 88674679 + ... + 88675235.

Almost surely, 2^49391951049 is an apocalyptic number.

49391951049 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

49391951049 is the 222243-rd square number.

49391951049 is the 111122-nd centered octagonal number.

It is an amenable number.

49391951049 is a deficient number, since it is larger than the sum of its proper divisors (38355391998).

49391951049 is an equidigital number, since it uses as much as digits as its factorization.

49391951049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 54.

The spelling of 49391951049 in words is "forty-nine billion, three hundred ninety-one million, nine hundred fifty-one thousand, forty-nine".