16621456406134 has 16 divisors (see below), whose sum is σ = 26039779471872. Its totient is φ = 7942185105448.

The previous prime is 16621456406063. The next prime is 16621456406147. The reversal of 16621456406134 is 43160465412661.

It is a super-3 number, since 3×16621456406134³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163746184 + ... + 163847659.

It is an arithmetic number, because the mean of its divisors is an integer number (1627486216992).

Almost surely, 2^{16621456406134} is an apocalyptic number.

16621456406134 is a deficient number, since it is larger than the sum of its proper divisors (9418323065738).

16621456406134 is a wasteful number, since it uses less digits than its factorization.

16621456406134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327594971.

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 16621456406134 in words is "sixteen trillion, six hundred twenty-one billion, four hundred fifty-six million, four hundred six thousand, one hundred thirty-four".