31855469549 has 4 divisors (see below), whose sum is σ = 31857488064. Its totient is φ = 31853451036.

The previous prime is 31855469537. The next prime is 31855469551. The reversal of 31855469549 is 94596455813.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94596455813 = 13487 ⋅7013899.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31855469549 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 (31855409549) 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, 985397 + ... + 1017210.

It is an arithmetic number, because the mean of its divisors is an integer number (7964372016).

Almost surely, 2^31855469549 is an apocalyptic number.

It is an amenable number.

31855469549 is a deficient number, since it is larger than the sum of its proper divisors (2018515).

31855469549 is a wasteful number, since it uses less digits than its factorization.

31855469549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018514.

The product of its digits is 23328000, while the sum is 59.

The spelling of 31855469549 in words is "thirty-one billion, eight hundred fifty-five million, four hundred sixty-nine thousand, five hundred forty-nine".