405755250161 has 8 divisors (see below), whose sum is σ = 413852267304. Its totient is φ = 397674576000.

The previous prime is 405755250097. The next prime is 405755250169. The reversal of 405755250161 is 161052557504.

It can be written as a sum of positive squares in 4 ways, for example, as 68100121600 + 337655128561 = 260960^2 + 581081^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 405755250161 - 2⁶ = 405755250097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (405755250169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4035590 + ... + 4134911.

It is an arithmetic number, because the mean of its divisors is an integer number (51731533413).

Almost surely, 2^405755250161 is an apocalyptic number.

It is an amenable number.

405755250161 is a deficient number, since it is larger than the sum of its proper divisors (8097017143).

405755250161 is an equidigital number, since it uses as much as digits as its factorization.

405755250161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8171491.

The product of its (nonzero) digits is 210000, while the sum is 41.

The spelling of 405755250161 in words is "four hundred five billion, seven hundred fifty-five million, two hundred fifty thousand, one hundred sixty-one".