31161200649 has 8 divisors (see below), whose sum is σ = 42168391200. Its totient is φ = 20464071936.

The previous prime is 31161200641. The next prime is 31161200663. The reversal of 31161200649 is 94600216113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31161200649 - 2³ = 31161200641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31161200641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77515224 + ... + 77515625.

It is an arithmetic number, because the mean of its divisors is an integer number (5271048900).

Almost surely, 2^31161200649 is an apocalyptic number.

It is an amenable number.

31161200649 is a deficient number, since it is larger than the sum of its proper divisors (11007190551).

31161200649 is a wasteful number, since it uses less digits than its factorization.

31161200649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155030919.

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 31161200649 in words is "thirty-one billion, one hundred sixty-one million, two hundred thousand, six hundred forty-nine".