252240806381805 has 40 divisors (see below), whose sum is σ = 452180580268032. Its totient is φ = 134523794937312.

The previous prime is 252240806381803. The next prime is 252240806381897. The reversal of 252240806381805 is 508183608042252.

252240806381805 is a `hidden beast` number, since 2 + 5 + 22 + 408 + 0 + 6 + 38 + 180 + 5 = 666.

It is not a de Polignac number, because 252240806381805 - 2¹ = 252240806381803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252240806381801) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1055572 + ... + 22485458.

Almost surely, 2^{252240806381805} is an apocalyptic number.

It is an amenable number.

252240806381805 is a deficient number, since it is larger than the sum of its proper divisors (199939773886227).

252240806381805 is a wasteful number, since it uses less digits than its factorization.

252240806381805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21458967 (or 21458958 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 54.

The spelling of 252240806381805 in words is "two hundred fifty-two trillion, two hundred forty billion, eight hundred six million, three hundred eighty-one thousand, eight hundred five".