31643119989 has 16 divisors (see below), whose sum is σ = 50484750400. Its totient is φ = 19472689008.

The previous prime is 31643119987. The next prime is 31643119997. The reversal of 31643119989 is 98991134613.

31643119989 is a `hidden beast` number, since 3 + 16 + 431 + 199 + 8 + 9 = 666.

It is not a de Polignac number, because 31643119989 - 2¹ = 31643119987 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 (31643119987) 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, 45075319 + ... + 45076020.

It is an arithmetic number, because the mean of its divisors is an integer number (3155296900).

Almost surely, 2^31643119989 is an apocalyptic number.

31643119989 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

31643119989 is a deficient number, since it is larger than the sum of its proper divisors (18841630411).

31643119989 is a wasteful number, since it uses less digits than its factorization.

31643119989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90151361 (or 90151355 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The spelling of 31643119989 in words is "thirty-one billion, six hundred forty-three million, one hundred nineteen thousand, nine hundred eighty-nine".