49999999989 has 16 divisors (see below), whose sum is σ = 71045332992. Its totient is φ = 31205671728.

The previous prime is 49999999967. The next prime is 50000000021. The reversal of 49999999989 is 98999999994.

It is not a de Polignac number, because 49999999989 - 2⁵ = 49999999957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49999999589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7705669 + ... + 7712154.

It is an arithmetic number, because the mean of its divisors is an integer number (4440333312).

Almost surely, 2^49999999989 is an apocalyptic number.

It is an amenable number.

49999999989 is a deficient number, since it is larger than the sum of its proper divisors (21045333003).

49999999989 is a wasteful number, since it uses less digits than its factorization.

49999999989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15417896.

The product of its digits is 12397455648, while the sum is 93.

The spelling of 49999999989 in words is "forty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-nine".