405694666146 has 32 divisors (see below), whose sum is σ = 1011602285568. Its totient is φ = 105375237840.

The previous prime is 405694666141. The next prime is 405694666151. The reversal of 405694666146 is 641666496504.

It is an interprime number because it is at equal distance from previous prime (405694666141) and next prime (405694666151).

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 15 ways as a sum of consecutive naturals, for example, 439063030 + ... + 439063953.

It is an arithmetic number, because the mean of its divisors is an integer number (31612571424).

Almost surely, 2^405694666146 is an apocalyptic number.

405694666146 is an abundant number, since it is smaller than the sum of its proper divisors (605907619422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405694666146 is a wasteful number, since it uses less digits than its factorization.

405694666146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878127006.

The product of its (nonzero) digits is 22394880, while the sum is 57.

The spelling of 405694666146 in words is "four hundred five billion, six hundred ninety-four million, six hundred sixty-six thousand, one hundred forty-six".