42521650641 has 12 divisors (see below), whose sum is σ = 61422172032. Its totient is φ = 28346839416.

The previous prime is 42521650631. The next prime is 42521650651. The reversal of 42521650641 is 14605612524.

42521650641 is a `hidden beast` number, since 4 + 2 + 5 + 2 + 1 + 6 + 5 + 0 + 641 = 666.

It is an interprime number because it is at equal distance from previous prime (42521650631) and next prime (42521650651).

It is not a de Polignac number, because 42521650641 - 2¹¹ = 42521648593 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42521650596 and 42521650605.

It is not an unprimeable number, because it can be changed into a prime (42521650601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321000 + ... + 433686.

It is an arithmetic number, because the mean of its divisors is an integer number (5118514336).

Almost surely, 2^42521650641 is an apocalyptic number.

It is an amenable number.

42521650641 is a deficient number, since it is larger than the sum of its proper divisors (18900521391).

42521650641 is a wasteful number, since it uses less digits than its factorization.

42521650641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154620 (or 154617 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 42521650641 in words is "forty-two billion, five hundred twenty-one million, six hundred fifty thousand, six hundred forty-one".