1609391239406 has 32 divisors (see below), whose sum is σ = 2605232678400. Its totient is φ = 743184711360.

The previous prime is 1609391239399. The next prime is 1609391239411. The reversal of 1609391239406 is 6049321939061.

It is a super-2 number, since 2×1609391239406² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 93926 + ... + 1796553.

It is an arithmetic number, because the mean of its divisors is an integer number (81413521200).

Almost surely, 2^{1609391239406} is an apocalyptic number.

1609391239406 is a deficient number, since it is larger than the sum of its proper divisors (995841438994).

1609391239406 is a wasteful number, since it uses less digits than its factorization.

1609391239406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891064.

The product of its (nonzero) digits is 1889568, while the sum is 53.

The spelling of 1609391239406 in words is "one trillion, six hundred nine billion, three hundred ninety-one million, two hundred thirty-nine thousand, four hundred six".