21613312775505 has 32 divisors (see below), whose sum is σ = 37748677938048. Its totient is φ = 10472620032000.

The previous prime is 21613312775491. The next prime is 21613312775591. The reversal of 21613312775505 is 50557721331612.

It is not a de Polignac number, because 21613312775505 - 2²³ = 21613304386897 is a prime.

It is a super-3 number, since 3×21613312775505³ (a number of 41 digits) contains 333 as substring.

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, 40747696 + ... + 41274705.

It is an arithmetic number, because the mean of its divisors is an integer number (1179646185564).

Almost surely, 2^{21613312775505} is an apocalyptic number.

It is an amenable number.

21613312775505 is a deficient number, since it is larger than the sum of its proper divisors (16135365162543).

21613312775505 is a wasteful number, since it uses less digits than its factorization.

21613312775505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82024017.

The product of its (nonzero) digits is 1323000, while the sum is 48.

The spelling of 21613312775505 in words is "twenty-one trillion, six hundred thirteen billion, three hundred twelve million, seven hundred seventy-five thousand, five hundred five".