31800054945 has 16 divisors (see below), whose sum is σ = 50894164800. Its totient is φ = 16955337024.

The previous prime is 31800054883. The next prime is 31800054953. The reversal of 31800054945 is 54945000813.

It is not a de Polignac number, because 31800054945 - 2¹¹ = 31800052897 is a prime.

It is a super-2 number, since 2×31800054945² (a number of 22 digits) contains 22 as substring.

31800054945 is a modest number, since divided by 54945 gives 31800 as remainder.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236895 + ... + 346004.

It is an arithmetic number, because the mean of its divisors is an integer number (3180885300).

Almost surely, 2^31800054945 is an apocalyptic number.

It is an amenable number.

31800054945 is a deficient number, since it is larger than the sum of its proper divisors (19094109855).

31800054945 is a wasteful number, since it uses less digits than its factorization.

31800054945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586544.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 31800054945 in words is "thirty-one billion, eight hundred million, fifty-four thousand, nine hundred forty-five".