49257171839 has 4 divisors (see below), whose sum is σ = 49286165400. Its totient is φ = 49228178280.

The previous prime is 49257171833. The next prime is 49257171857. The reversal of 49257171839 is 93817175294.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 49257171839 - 2⁸ = 49257171583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49257171833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14494232 + ... + 14497629.

It is an arithmetic number, because the mean of its divisors is an integer number (12321541350).

Almost surely, 2^49257171839 is an apocalyptic number.

49257171839 is a deficient number, since it is larger than the sum of its proper divisors (28993561).

49257171839 is a wasteful number, since it uses less digits than its factorization.

49257171839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28993560.

The product of its digits is 3810240, while the sum is 56.

The spelling of 49257171839 in words is "forty-nine billion, two hundred fifty-seven million, one hundred seventy-one thousand, eight hundred thirty-nine".