163040526406521 has 48 divisors (see below), whose sum is σ = 241746277707792. Its totient is φ = 105852765081600.

The previous prime is 163040526406481. The next prime is 163040526406531. The reversal of 163040526406521 is 125604625040361.

163040526406521 is a `hidden beast` number, since 1 + 6 + 3 + 0 + 4 + 0 + 526 + 40 + 65 + 21 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 105794067600 + 162934732338921 = 325260^2 + 12764589^2 .

It is not a de Polignac number, because 163040526406521 - 2¹¹ = 163040526404473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163040526406531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19327981 + ... + 26450933.

It is an arithmetic number, because the mean of its divisors is an integer number (5036380785579).

Almost surely, 2^{163040526406521} is an apocalyptic number.

It is an amenable number.

163040526406521 is a deficient number, since it is larger than the sum of its proper divisors (78705751301271).

163040526406521 is a wasteful number, since it uses less digits than its factorization.

163040526406521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7123434 (or 7123431 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 163040526406521 in words is "one hundred sixty-three trillion, forty billion, five hundred twenty-six million, four hundred six thousand, five hundred twenty-one".