49209765729 has 4 divisors (see below), whose sum is σ = 65613020976. Its totient is φ = 32806510484.

The previous prime is 49209765727. The next prime is 49209765739. The reversal of 49209765729 is 92756790294.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49209765729 - 2¹ = 49209765727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49209765727) 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 3 ways as a sum of consecutive naturals, for example, 8201627619 + ... + 8201627624.

It is an arithmetic number, because the mean of its divisors is an integer number (16403255244).

Almost surely, 2^49209765729 is an apocalyptic number.

It is an amenable number.

49209765729 is a deficient number, since it is larger than the sum of its proper divisors (16403255247).

49209765729 is a wasteful number, since it uses less digits than its factorization.

49209765729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16403255246.

The product of its (nonzero) digits is 17146080, while the sum is 60.

The spelling of 49209765729 in words is "forty-nine billion, two hundred nine million, seven hundred sixty-five thousand, seven hundred twenty-nine".