27721762266440 has 32 divisors (see below), whose sum is σ = 68044325564160. Its totient is φ = 10080640824000.

The previous prime is 27721762266437. The next prime is 27721762266463. The reversal of 27721762266440 is 4466226712772.

It is a super-2 number, since 2×27721762266440² (a number of 28 digits) contains 22 as substring.

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, 31502002136 + ... + 31502003015.

It is an arithmetic number, because the mean of its divisors is an integer number (2126385173880).

Almost surely, 2^{27721762266440} is an apocalyptic number.

27721762266440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27721762266440 is an abundant number, since it is smaller than the sum of its proper divisors (40322563297720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27721762266440 is a wasteful number, since it uses less digits than its factorization.

27721762266440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63004005173 (or 63004005169 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 56.

The spelling of 27721762266440 in words is "twenty-seven trillion, seven hundred twenty-one billion, seven hundred sixty-two million, two hundred sixty-six thousand, four hundred forty".