431666145045506 has 48 divisors (see below), whose sum is σ = 769575563767296. Its totient is φ = 180984435778944.

The previous prime is 431666145045503. The next prime is 431666145045523. The reversal of 431666145045506 is 605540541666134.

It is not an unprimeable number, because it can be changed into a prime (431666145045503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9955415 + ... + 31023258.

It is an arithmetic number, because the mean of its divisors is an integer number (16032824245152).

Almost surely, 2^{431666145045506} is an apocalyptic number.

431666145045506 is a deficient number, since it is larger than the sum of its proper divisors (337909418721790).

431666145045506 is a wasteful number, since it uses less digits than its factorization.

431666145045506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40981023 (or 40981016 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 56.

The spelling of 431666145045506 in words is "four hundred thirty-one trillion, six hundred sixty-six billion, one hundred forty-five million, forty-five thousand, five hundred six".