21277560465272 has 16 divisors (see below), whose sum is σ = 40376093655240. Its totient is φ = 10510602157216.

The previous prime is 21277560465257. The next prime is 21277560465289. The reversal of 21277560465272 is 27256406577212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16022258723 + ... + 16022260050.

Almost surely, 2^{21277560465272} is an apocalyptic number.

It is an amenable number.

21277560465272 is a deficient number, since it is larger than the sum of its proper divisors (19098533189968).

21277560465272 is a wasteful number, since it uses less digits than its factorization.

21277560465272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32044518862 (or 32044518858 counting only the distinct ones).

The product of its (nonzero) digits is 19756800, while the sum is 56.

The spelling of 21277560465272 in words is "twenty-one trillion, two hundred seventy-seven billion, five hundred sixty million, four hundred sixty-five thousand, two hundred seventy-two".