49562781129 has 9 divisors (see below), whose sum is σ = 71591648583. Its totient is φ = 33041408832.

The previous prime is 49562781127. The next prime is 49562781139. The reversal of 49562781129 is 92118726594.

It is a happy number.

The square root of 49562781129 is 222627.

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

49562781129 is a `hidden beast` number, since 4 + 9 + 5 + 627 + 8 + 1 + 1 + 2 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 48963510729 + 599270400 = 221277^2 + 24480^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 49562781129 - 2¹ = 49562781127 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49562781127) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 630777 + ... + 704985.

Almost surely, 2^49562781129 is an apocalyptic number.

49562781129 is the 222627-th square number.

49562781129 is the 111314-th centered octagonal number.

It is an amenable number.

49562781129 is a deficient number, since it is larger than the sum of its proper divisors (22028867454).

49562781129 is an frugal number, since it uses more digits than its factorization.

49562781129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148424 (or 74212 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 49562781129 in words is "forty-nine billion, five hundred sixty-two million, seven hundred eighty-one thousand, one hundred twenty-nine".