49257981689 has 16 divisors (see below), whose sum is σ = 57078919296. Its totient is φ = 41636400000.

The previous prime is 49257981677. The next prime is 49257981727. The reversal of 49257981689 is 98618975294.

It is a cyclic number.

It is not a de Polignac number, because 49257981689 - 2²⁴ = 49241204473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49257981629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38669 + ... + 316245.

It is an arithmetic number, because the mean of its divisors is an integer number (3567432456).

Almost surely, 2^49257981689 is an apocalyptic number.

It is an amenable number.

49257981689 is a deficient number, since it is larger than the sum of its proper divisors (7820937607).

49257981689 is a wasteful number, since it uses less digits than its factorization.

49257981689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277936.

The product of its digits is 78382080, while the sum is 68.

The spelling of 49257981689 in words is "forty-nine billion, two hundred fifty-seven million, nine hundred eighty-one thousand, six hundred eighty-nine".