30645641533 has 12 divisors (see below), whose sum is σ = 33395727828. Its totient is φ = 28108080000.

The previous prime is 30645641513. The next prime is 30645641567. The reversal of 30645641533 is 33514654603.

It can be written as a sum of positive squares in 6 ways, for example, as 13447417369 + 17198224164 = 115963^2 + 131142^2 .

It is not a de Polignac number, because 30645641533 - 2¹⁷ = 30645510461 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 (30645641513) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 550968 + ... + 604033.

It is an arithmetic number, because the mean of its divisors is an integer number (2782977319).

Almost surely, 2^30645641533 is an apocalyptic number.

It is an amenable number.

30645641533 is a deficient number, since it is larger than the sum of its proper divisors (2750086295).

30645641533 is a wasteful number, since it uses less digits than its factorization.

30645641533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155184 (or 1155171 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 40.

The spelling of 30645641533 in words is "thirty billion, six hundred forty-five million, six hundred forty-one thousand, five hundred thirty-three".