16404635425405 has 16 divisors (see below), whose sum is σ = 20870721345600. Its totient is φ = 12343540890240.

The previous prime is 16404635425363. The next prime is 16404635425421. The reversal of 16404635425405 is 50452453640461.

It is not a de Polignac number, because 16404635425405 - 2¹³ = 16404635417213 is a prime.

It is a super-2 number, since 2×16404635425405² (a number of 27 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, 621139216 + ... + 621165625.

It is an arithmetic number, because the mean of its divisors is an integer number (1304420084100).

Almost surely, 2^{16404635425405} is an apocalyptic number.

It is an amenable number.

16404635425405 is a deficient number, since it is larger than the sum of its proper divisors (4466085920195).

16404635425405 is a wasteful number, since it uses less digits than its factorization.

16404635425405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242305004.

The product of its (nonzero) digits is 6912000, while the sum is 49.

The spelling of 16404635425405 in words is "sixteen trillion, four hundred four billion, six hundred thirty-five million, four hundred twenty-five thousand, four hundred five".