1606405663373 has 32 divisors (see below), whose sum is σ = 1907232687360. Its totient is φ = 1323821882880.

The previous prime is 1606405663361. The next prime is 1606405663411. The reversal of 1606405663373 is 3733665046061.

It is a happy number.

It is not a de Polignac number, because 1606405663373 - 2⁶ = 1606405663309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606405683373) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93370790 + ... + 93387992.

It is an arithmetic number, because the mean of its divisors is an integer number (59601021480).

Almost surely, 2^{1606405663373} is an apocalyptic number.

It is an amenable number.

1606405663373 is a deficient number, since it is larger than the sum of its proper divisors (300827023987).

1606405663373 is a wasteful number, since it uses less digits than its factorization.

1606405663373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19157.

The product of its (nonzero) digits is 4898880, while the sum is 50.

The spelling of 1606405663373 in words is "one trillion, six hundred six billion, four hundred five million, six hundred sixty-three thousand, three hundred seventy-three".