855431999999906 has 32 divisors (see below), whose sum is σ = 1468765954529280. Its totient is φ = 366036004965456.

The previous prime is 855431999999831. The next prime is 855431999999923. The reversal of 855431999999906 is 609999999134558.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155682221 + ... + 161083263.

It is an arithmetic number, because the mean of its divisors is an integer number (45898936079040).

Almost surely, 2^{855431999999906} is an apocalyptic number.

855431999999906 is a deficient number, since it is larger than the sum of its proper divisors (613333954529374).

855431999999906 is a wasteful number, since it uses less digits than its factorization.

855431999999906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5418878.

The product of its (nonzero) digits is 68874753600, while the sum is 95.

The spelling of 855431999999906 in words is "eight hundred fifty-five trillion, four hundred thirty-one billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred six".