21723525156616 has 32 divisors (see below), whose sum is σ = 41362916052960. Its totient is φ = 10693942780032.

The previous prime is 21723525156523. The next prime is 21723525156649. The reversal of 21723525156616 is 61665152532712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32706570 + ... + 33364153.

It is an arithmetic number, because the mean of its divisors is an integer number (1292591126655).

Almost surely, 2^{21723525156616} is an apocalyptic number.

It is an amenable number.

21723525156616 is a deficient number, since it is larger than the sum of its proper divisors (19639390896344).

21723525156616 is a wasteful number, since it uses less digits than its factorization.

21723525156616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66071365 (or 66071361 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 52.

The spelling of 21723525156616 in words is "twenty-one trillion, seven hundred twenty-three billion, five hundred twenty-five million, one hundred fifty-six thousand, six hundred sixteen".