49999989431 has 16 divisors (see below), whose sum is σ = 58234512384. Its totient is φ = 42038758944.

The previous prime is 49999989419. The next prime is 49999989463. The reversal of 49999989431 is 13498999994.

It is not a de Polignac number, because 49999989431 - 2¹⁰ = 49999988407 is a prime.

It is a super-2 number, since 2×49999989431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49999989631) 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, 1903916 + ... + 1929998.

It is an arithmetic number, because the mean of its divisors is an integer number (3639657024).

Almost surely, 2^49999989431 is an apocalyptic number.

49999989431 is a deficient number, since it is larger than the sum of its proper divisors (8234522953).

49999989431 is a wasteful number, since it uses less digits than its factorization.

49999989431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31310.

The product of its digits is 204073344, while the sum is 74.

The spelling of 49999989431 in words is "forty-nine billion, nine hundred ninety-nine million, nine hundred eighty-nine thousand, four hundred thirty-one".