21073764153616 has 40 divisors (see below), whose sum is σ = 40858072193048. Its totient is φ = 10529747712000.

The previous prime is 21073764153599. The next prime is 21073764153643. The reversal of 21073764153616 is 61635146737012.

It can be written as a sum of positive squares in 4 ways, for example, as 96484784400 + 20977279369216 = 310620^2 + 4580096^2 .

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, 162014686 + ... + 162144706.

Almost surely, 2^{21073764153616} is an apocalyptic number.

It is an amenable number.

21073764153616 is a deficient number, since it is larger than the sum of its proper divisors (19784308039432).

21073764153616 is a wasteful number, since it uses less digits than its factorization.

21073764153616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136811 (or 136805 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 21073764153616 in words is "twenty-one trillion, seventy-three billion, seven hundred sixty-four million, one hundred fifty-three thousand, six hundred sixteen".