31845411621 has 6 divisors (see below), whose sum is σ = 45998927910. Its totient is φ = 21230274408.

The previous prime is 31845411613. The next prime is 31845411629. The reversal of 31845411621 is 12611454813.

31845411621 is a `hidden beast` number, since 3 + 1 + 84 + 541 + 16 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (31845411613) and next prime (31845411629).

It can be written as a sum of positive squares in only one way, i.e., 25340182596 + 6505229025 = 159186^2 + 80655^2 .

It is not a de Polignac number, because 31845411621 - 2³ = 31845411613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31845411629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1769189526 + ... + 1769189543.

It is an arithmetic number, because the mean of its divisors is an integer number (7666487985).

Almost surely, 2^31845411621 is an apocalyptic number.

It is an amenable number.

31845411621 is a deficient number, since it is larger than the sum of its proper divisors (14153516289).

31845411621 is a wasteful number, since it uses less digits than its factorization.

31845411621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538379075 (or 3538379072 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The spelling of 31845411621 in words is "thirty-one billion, eight hundred forty-five million, four hundred eleven thousand, six hundred twenty-one".