16521494065142 has 64 divisors (see below), whose sum is σ = 28952694086400. Its totient is φ = 6990966766080.

The previous prime is 16521494065099. The next prime is 16521494065163. The reversal of 16521494065142 is 24156049412561.

It is a happy number.

It is a super-2 number, since 2×16521494065142² (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 31 ways as a sum of consecutive naturals, for example, 58480658 + ... + 58762490.

It is an arithmetic number, because the mean of its divisors is an integer number (452385845100).

Almost surely, 2^{16521494065142} is an apocalyptic number.

16521494065142 is a deficient number, since it is larger than the sum of its proper divisors (12431200021258).

16521494065142 is a wasteful number, since it uses less digits than its factorization.

16521494065142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284301.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 16521494065142 in words is "sixteen trillion, five hundred twenty-one billion, four hundred ninety-four million, sixty-five thousand, one hundred forty-two".