405694666145 has 8 divisors (see below), whose sum is σ = 487400349120. Its totient is φ = 324177899760.

The previous prime is 405694666141. The next prime is 405694666151. The reversal of 405694666145 is 541666496504.

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

It is not a de Polignac number, because 405694666145 - 2² = 405694666141 is a prime.

It is a super-2 number, since 2×405694666145² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (405694666141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47224421 + ... + 47233010.

It is an arithmetic number, because the mean of its divisors is an integer number (60925043640).

Almost surely, 2^405694666145 is an apocalyptic number.

It is an amenable number.

405694666145 is a deficient number, since it is larger than the sum of its proper divisors (81705682975).

405694666145 is an equidigital number, since it uses as much as digits as its factorization.

405694666145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94458295.

The product of its (nonzero) digits is 18662400, while the sum is 56.

The spelling of 405694666145 in words is "four hundred five billion, six hundred ninety-four million, six hundred sixty-six thousand, one hundred forty-five".